Check out Hutech's site
http://www.sciencecenter.net/hutech/newprod.htm
And prices
http://www.sciencecenter.net/hutech/canon.htm
My best guess is the modified 5D will be about AUS. $6K.
Bang for buck the modified 350D is best.(Cventer)
The modified 20D is better than the modified 350D with higher ISO and lower noise.
The modified 5D would be better still, if price was no impediment.It would have a bigger field being full frame.
Bert