Your room is small for a price-is-no-object speaker, in my opinion. Anything rear- or side-firing is also going to be problematic, which leaves out the top-end AP's.
Your front-end components are second-to-none, your cabling is totally uncompromising, your amp is among the dozen or so most highly coveted integrateds ever made, and your speakers are designed, more or less explicitly, for rooms of the size and general timbre of your library. The only problem with the Sparks is that the aft-facing ports are probably not functioning to full capability because of what's behind them.
I know it's no fun (believe me I know), when you post in a forum and say, "what speakers" and people come back with reactions that aren't speakers -- but honestly I think room treatments and more tweaking of placement will make an enormous difference. (What are the walls made of? Any windows? Any window treatments? Carpeting? Can you take a digital photo of the room?)
I also wonder if there's anything specific about the Sparks that is inspiring you to think about a change: if you find them a bit muddled in the area of microphonic detail, I might recommend a pair of Linns or Joseph Audios. If you find the treble too laid back, you might prefer Vienna Acoustics or Tyler Acoustics. If soundstage is thin, you might like DeVores or Meadowlarks. If the bass sounds muddy, you might like the Proacs or the Neats. And if the sound just isn't quite musically involving enough, as an integrated whole, maybe you'd really like the Spendors.
But in all of these possibilities -- *except* for the laid-back treble -- I'd say it's not the speakers so much as the room. The Spark is an awfully well-respected speaker for the situation you're faced with, and (except for the highs, which are too polite for me) I think they belong high on anyone's short-list for an 11' x 12' library.
Cheers.
Your front-end components are second-to-none, your cabling is totally uncompromising, your amp is among the dozen or so most highly coveted integrateds ever made, and your speakers are designed, more or less explicitly, for rooms of the size and general timbre of your library. The only problem with the Sparks is that the aft-facing ports are probably not functioning to full capability because of what's behind them.
I know it's no fun (believe me I know), when you post in a forum and say, "what speakers" and people come back with reactions that aren't speakers -- but honestly I think room treatments and more tweaking of placement will make an enormous difference. (What are the walls made of? Any windows? Any window treatments? Carpeting? Can you take a digital photo of the room?)
I also wonder if there's anything specific about the Sparks that is inspiring you to think about a change: if you find them a bit muddled in the area of microphonic detail, I might recommend a pair of Linns or Joseph Audios. If you find the treble too laid back, you might prefer Vienna Acoustics or Tyler Acoustics. If soundstage is thin, you might like DeVores or Meadowlarks. If the bass sounds muddy, you might like the Proacs or the Neats. And if the sound just isn't quite musically involving enough, as an integrated whole, maybe you'd really like the Spendors.
But in all of these possibilities -- *except* for the laid-back treble -- I'd say it's not the speakers so much as the room. The Spark is an awfully well-respected speaker for the situation you're faced with, and (except for the highs, which are too polite for me) I think they belong high on anyone's short-list for an 11' x 12' library.
Cheers.