Wow man... why'd you put Baby in the corner?
Well, I'm just gonna come clean and say it time to fight for the right to have a proper HT set up.
(OK, friendly needling aside...)
Please do not misunderstand... we all have things we have to do to make it work in our own homes. Not all of us get to design from the ground up like Gene, or pull a Danzilla and just
pimp out the whole floor. Also a corner can be used to good effect.
I've been criticized for having my Mains too close together, and I would say the same for you, too. It's not the end of the world, but it can have a significant effect on what you can attain in terms of potential soundstage and imaging.
If you are happy with them, I would say keep the Infinitys for another year or two and see what you can do on working up a plan for resetting your system. To me, proper Speaker placement would need to be just as important as picking the proper Speakers for you. Towers allow for greater dynamics, and as we already discussed our predilection for 3-ways...
Anyway... I say sit tight for a bit. See what you can work out for set up. Save some coin for a real upgrade. If your SO is willing, get her involved. Show her some pictures of Salk Speakers!
Tell her she can pick the veneer and finish!