Just stick a KryoII GFX card in one of those and you have your new machine!!!!!
Hm.. Guess he's thinking about putting the Kryo onboard, but then why not go for the MicroA1..
As for Z3, really why ? Everybody is moving away from Zorro to PCI... Up the price of your Amiga6k by putting an expensive Z3 soundcard in it ?? Maybe just a video slot as an optional extra.. Somebody might be able to get the toaster working..
If you really want to make something special, then indeed, do that, but what you're doing now isn't making much sense as it's just an A1/Peg with a standard GFX card included and expensive expansion option hardly anybody, if any at all is going to use.