Nice review-I have had a similar situation.

I am in the same situation. My daughter is moving to Houston later on this year and wanted to help set up a good audio system.

I had already upgraded my NHT VT 2.0's to Martin logan Vantage and the NHT center to the ML cinima i when i blew out one channel of my 750 by excersizing Vatages at loud levels of high frequency sound.

I decided to upgrade to the 7500 and later on this year get the 750 repaired for my daughter (and have it shipped to Houston after being fixed). Steve has been very helpful working out the details on this.

The 7500 is enough of an improvemnet with respect to the 750 in stereo listening that my wife (who desn't usually comment) said it was quite a difference. The major difference is in transients-especially low level transients. Sitar music really sounds much better than before. Of course this is where electrostatics really shine and the 7500 does a great job showng the strenghts of these speakers.

I had been told in the Martin Logan Club to get a pair of Krell mono blocks-but those are out my price range and were frankly out of the question. I am sure high power class a amps might sound a bit smoother but after listening to Dianna Krall and Mozart piano played by M. Uschida I must say I have never heard the system sound better.

Needless to say multi channel 5.1, 7.1 DVDs sound just great. I use a Hafler DH 200 for the rear surrounds (still NHT). Another DH200 -bridged drives my Hsu woofer. The side speakers are NHT dipoles driven by the 7500.

After blowing several fuses over the years in my Haflers I really do appreciate the concept of a pair and a spare so your 750 is great for piece of mind at the least. I have an older Soundstream 100 watt mono for that purpose-and the knowledge that I can aways go to 5.1 or 5 with the Vantages' to do the LFE let's me sleep at night.

A 1999 Lexicon DC-1 ver 4 (DTS) is my processor so I do drive the 7500 unbalanced except for the mains . I have a Rane ME 60 which has balanced outputs. The Vantages only needed very minimal touch ups but the Rane actively converts to balanced.

Given the power requirements I have two dedicated cirsuits for all this stuff.

After I installed there was no hum and all went well.

Joel