God, I want so desperately to help you. But it is hopeless.
I am a proponent of the "happy wife - happy life" philosophy. If you force her from the loveseat to the chair, the first time (and every other time) that seating arrangement strikes her as inconvenient, you lose.
So, you either have to get her to *really* like the idea of the chair, or you have to get the loveseat and tinker with speaker placement.
If it was me, I'd get TWO sofas and put them at a 45 degree angle to each other so that everybody has to turn their head!
Okay, less glibly, you won't know until you get everything set up. And my hypothesis based on my experience is that closing the distance between the mains will still result in a delightful experience.
Let us know how it goes.
