My first suggestion would be to try the Klipsch Forums.
I have owned many Klipsch speakers that have a smaller footprint. I currently have a pair of Chorus I and think they may be the Goldilocks speaker for me, but only if I can tame their brightness. To that end, I recently replaced the tweeters and am waiting delivery of some Quicksilver Horn monoblock amps. I think the tweeters are going to take some time to break in.
Here is my list of Klipsch speakers I've owned in order of my preference.
KLF-30 Upgraded tweeters, mids, replaced crossovers, and glued the back of the box. These were the easiest to listen to and could play to very loud levels without sounding bright. The downside is that they are hard to find and the back panels often come unglued. At high volumes, you'll hear some the box vibrating even after re-gluing them. Some internal bracing might help this. They are very large speakers, but have a smaller footprint than your La Scalas.
CF-3 I had Version 3, which are purported to be the "worst" of the 3 versions, with version 1 being hailed as the "best". I upgraded the crossovers. Theser are hard to find. I regretted selling these. They may have been better than the KLF-30. I think they were built better and they sounded great.
Chorus 1 These are a step up in build quality than the two previously mentioned. I think they may sound closer to the La Scala, but with more bass. I've heard La Scalas, but not in my room. I liked them, but found them too bright. If these match up well with the amps I ordered and I can tame the brightness, they will move to the top of the list.
Quartet I really like these and have kept them in my bedroom system. They are easy to listen to but get a little compressed when pushed hard. If you listen at moderate volumes, these may be perfect. They are really easy to listen to and are at the top of my list in terms of being easy to listen to with no fatigue. They sound fantastic with acoustic guitars and female vocals. In many ways they are my favorites, but I like to turn things up once in a while and they fall short in my larger room where my main system is when played loud. They are easy to place as the rear passive works with a wall to reinforce bass.
Heresy I Also very nice, but too small for my tastes. Definitely need help from a subwoofer.
RF-7 They played loud and looked more modern, but are more suited to home theater duty in my opinion.