I am becoming a fan of both of these brands. I estimate their reputations as roughly equal, but more importantly, I've not heard either piece you are considering, so my 2c are probably more like 1c.

I see that the Marantz has THX Ultra, so I too question whether this would be a true upgrade.

Of course, the Outlaw 30 day home trial means you have nothing to lose except return shipping costs if you want to audition the 7500...

Bears, beets, Battlestar Galactica.