01-11-12: Loomisjohnson
respectfully, your 75w/ch amp may not be enough juice for magnepan or revel. in your budget i'd look at the ohms, von schweikert vr2 (huge soundstage and low end) or energy veritas; vanns is also selling mirage omd28 for $1400--they're extremely room-filling.
The Vann's price for the OMD-28 is $1400 each, so that would be $2800 a pair. That's still a bargain given that they retailed at $7500/pair and were very competitive at that price. However, the OMD28's little brother, the OMD-15, is also available at Vanns at $1K/pair down from an original $2.5K/pair. They're plenty competitive at their original price and with a sensitivity of around 91dB, will match well with that Cambridge 650A. I've been living with my OMD-15s for 3-1/2 years in an open architecture cathedral-ceiling living space. They definitely fill the space well.
Also, with the money you save you could pick up one or two decent powered subs and then you would have a true full-range system and you could dial in the bass energy for the program material and your listening space.