Klipsch Forte IIIs vs. Heresy III with a sub


I have Forte IIIs but wifey thinks they are too big for our living room / 2 channel listening room.  Considering swapping for Heresy IIIs and adding a sub.  I like to get the really low frequency in stuff like Sylvan Esso but also want the sound of Klipsch for classic rock and jazz.

Three questions:

Will the Heresy IIIs sound as good as the Forte IIIs do now if I add the sub?
Will I be able to cross the sub over to match well with the Heresy's bass range?
Will a Sunfire 8" XTEQ sub work well with the Heresy IIIs?

thanks...
purplejester
I like tighter and more controllable bass which might be why I formed that opinion from an initial listen, plus I already had the subs subs that are very adjustable. The "new" mid horn has been accepted by Klipsch freaks as an improvement and I did like the general clarity of 'em, but the Heresy IIIs sounded more like the speakers I was using I suppose...those are Silverline Preludes I only replaced as I wanted the 99db efficiency for my little SEP amp. I still have the Preludes as I can't bring myself to sell them...yet...
Helps to listen though and it also depends on the room settings. The issue too is so many audio enthusiasts are just relying on flat audio settings.  In my opinion this whole thing about playing music flat is for the birds. That means one assumes that one setting works for every album and  that’s absurd.  When I buy records at store I’m not gonna know how well the recording really is until I play it.  Every room has a different sound and every album has a different sound.  If a person has an amplifier that has harsh characteristics, it’s just going to get transmitted through the speaker.  Tone controls help tone it down.  Some music is very warm like Wes Montgomery and Jimmy Smith.  On the other hand Herb Alpert albums typically sound more harsh.  With tone control I can make  adjustments to bass and treble.  I don’t think it’s practical to find amazingly well recorded albums all the time.  Some have a good bass extension and some don’t.  I’d still love to hear the Forte  side by side.
The Forte IIIs really lay recordings bare.   The difference from good to bad ones on  the Forte IIIs is about as big as I've heard.    Not sure the Heresy's are similar in that regard.