I think the results you would largely get from these sepeakers would depend on what you want out of them ultimately. If you never play speakers above a low threshold, and dynamic authority and weight are not too necessary for your tastes, then you would probably do fine tare both nice musical refined souding music speakers with a lot of music material that you're likely to listen to.(Jazz,Classical,vocals, light instrumentals, modest pop/rock, new age, etc.) On the other side of the TRUTH COIN here however, neither of these speakers are really well suited for heavy rock, heavy dynamic percussion, and the MUCH more demanding HT purposes!!! Although you will be helped out somewhat by crossing over these speakers to a sub for HT, both these speakers are going to sound a bit laid back and on the polite side. Neither they won't have the PRESSENCE, focused soundstage, nor reinforced dialog, midrange, and upperbass or treble that you get from a good HT/or Rock monitor!
I've sold both of these lines in the past, and am rather familiar with both. These are what I like to refer to as Limited application speakers overall! Mostly, these speakers will sound less than accurate with what movie mixers designed you to hear through them!...some would dissagree. But then, I'm a "no-compromise" kind of audiophile/HT nut, and just know what these speakers can and can't do!
Trust me here, no one recording either Rock and roll, heavy percussion, R&B, Techno, whatever,or other demanding music, much less MUCH MORE DEMANDING DD/DTS film soundtracks, would mix, record, or monitor on these speakers you're talking about there! Yes, they're nice sounding, refined, musical, clear, transparant, detailed sounding speakers. However, these are not the qualities that are leaned on with monitors designed to play back anything strong and weighty!..really we're talking limited maximized applications, truth be told.
There are TONS of speakers out there like you're considering here!. The only way you might get great results with the likes of the SF Piano's or Vienna's for ALL PORPOSE music/HT dubties, is to use them in a set up where you're physically close to the speakers! This usually entails smaller room set up's(where speaker placement, especially ported designs, is even MORE critical), rather than larger installations where dirrect reflections is a bigger issue from the listening seat, or where you're acoustically farther away from the speakers than they(speakers)are to the walls. If you can get these Vienna's or Piano's set up well in a smaller space, and can get a balance sound, and you sit closer to the speakers, you are going to get better results for HT purposes for sure from them. Otherwise, they'll have soft immaging, blured immage and soundstage, weak dialog reinforcement and detail enforcement, softer dynamics throughout, and much less pressence(critical for HT and harder dynamic stuff!). In the end however, they'll still have compromises for HT.
Let's put it this way, the speakers you're discussing are the antithesis of what a good high dynamic Pro Audio speaker or large CINEMAPLEX dynamic loud speaker is all about!...so there's tradeoffs. yeah you won't be using em in a large stadium, but the effect is still needed from what those speakers offer.
If you notice, DEDICATED HT SPEAKERS are not configured or designed like what you're considering, and for good reason. The Audio reviewers ALL use HT speakers for HT, because they work! But, like anything else, you take your compromises. Still, if you want to do it ALL BETTER, with better balance between movies and casual music, you might consider some of the higher end music speakers that will do either HT or music well across the board. If you like the clear refined sound(who doesn't) of something like the Grand Piano's, and still want an EFFECTIVE verstile HT speaker, there are speakers/monitors out there that seem to excell at movies/music better than others...
...I assume you're talking about getting FULL RANGE MONITORS for your music purposes(although you will set em as "small" on your movie processor!..yes!). Actually, if you MUST get similar speakers like what you're after, I've found a few passive full range high end music speakers that seem to do a better job with HT pressentation than most like them. NHT 2.9's/3.3's(better), Dunlavy SC III's/IV's, Thiel 2.3's(need big amp!), do much better jobs with HT/music applications than similar competition...if you're interested.
Anyway, there's a lot to consider i know. And, a lot of what I said can be constured as subjective and personal. I do find myself however liking speakers to maximize what I'm playing through them. And each person has different needs.
If I had to chose between Bethovens and Piano's for double dubty, I'd probably go with Bethovens for all purpose. Although I like the transparancy of the Piano's.
Also, something else ot consider for you might be to see what the Stereophile reviewers are using for their HT/music speakers! That way you can juggle some more ideas. Good luck
