IME, XT32 didn't go leaps and bounds above XT, but that was for me in my room. For you it might be different. For me, XT32 is irrelevant but you can't have subEQ without it. SubEQ really does do a very good job and for multiple subs. The only reason to spend more for it, to me, is if you're going to be keeping the receiver for awhile and don't want to get in deep with measuring and manually EQing. Also worth noting is that subEQ also sets the proper delay for the subs and gets them firing at nearly the same times pretty consistently.
I have to say I greatly prefer the UI of the Denon/Marantz units to the Pio's. MCACC has features that Audyssey doesn't which can be really nice depending on your needs, but the rest of the receiver usually leaves me underwhelmed except for their top end models. My personal preference is to Marantz. I don't know what you want to do budget wise, when factoring in external stuff, but a miniDSP, a mic, and the right soundcard can get you great results as add on. I think your best bet, within budget is probably this
Pio. It has just about everything you need and I'm pretty sure it's the cheapest model that has a full set of preouts.