I'm with Tigrisham, don't those MMGs require a lot of power? Not that the Peachtree's 125 is anything to sniff at - that's enough power for a lot of rooms. But some speakers are power hogs, and I think many (all?) of the Maggies fall into that category. Lots of Magnepan fans here, I'm sure they'll chime in.
Peachtree's USB asynch implementation is great - you're going to like the ESS Dac in that Nova. I went the same way as you, everything in one box, so convenient and easy.
In speakers, I see great stuff all the time (on CL, here in the classifieds, or "blemished" models) that you can pick up for $1000 or less. Zu Audio, Quad 21L/22L series, Audio Physik, not to mention new speakers like Wharfedale Diamond, Paradigm, Polk Audio you can get for under $1K. I also think the B&W 603 or 604 would sound great with the Peachtree in a big room, especially with rock music. And the nice thing about the $1K price level is that even if you get some speakers, and just don't like them, you can throw 'em up on CL and go try something else. Especially the B&W - they have great resale, I've traded in and out of those without losing a penny, they do so well on the secondary market. So don't agonize too much about this decision - it's fun to try different things anyway! (too many variables involved to say that any one speaker is the "best" with your amp, which is why I threw out several good options for you to look around for and try to audition).
Peachtree's USB asynch implementation is great - you're going to like the ESS Dac in that Nova. I went the same way as you, everything in one box, so convenient and easy.
In speakers, I see great stuff all the time (on CL, here in the classifieds, or "blemished" models) that you can pick up for $1000 or less. Zu Audio, Quad 21L/22L series, Audio Physik, not to mention new speakers like Wharfedale Diamond, Paradigm, Polk Audio you can get for under $1K. I also think the B&W 603 or 604 would sound great with the Peachtree in a big room, especially with rock music. And the nice thing about the $1K price level is that even if you get some speakers, and just don't like them, you can throw 'em up on CL and go try something else. Especially the B&W - they have great resale, I've traded in and out of those without losing a penny, they do so well on the secondary market. So don't agonize too much about this decision - it's fun to try different things anyway! (too many variables involved to say that any one speaker is the "best" with your amp, which is why I threw out several good options for you to look around for and try to audition).