New Build... the GEM amp

Hopefully this doesn't become a hall of shamer... it is quite costly...

I am planning to build a six channel amp for my active set-up, it will be this design: http://gmweb2.net/the_gem.htm
Here is an incredibly long thread about it...
http://www.diyaudio.com/forums/solid-state/60546-incredible-quality-amplifier-graham-prepare-your-ears-5.html

I will build two three channel chassis (so that I could put an amp next to a speaker as advised in the website) each with a 600 VA tfx with 30 V rails, I'm not sure, but around 20000uF per rail should be fine...
Below is a pic of the PCB's with blueing, so they don't tarnish before I get round to it...

I need to figure out where to spend on the amps - it is a low parts count amp, so i guess if we follow my philosophy that you hear parts more as they become less, you tend to hear the quality of the parts more...and where to get the freaking 2.5H 80 Ohm coils
Also how to make a three channel amp with massive heatsinks look nice on the floor or on the shelf next to another one...

So if there are any suggestions fire away...