I kinda like the Z80 also, back in the day, I wire-wrapped a Z80 system from various magazine articles. It's still around here somewhere...
But the Coldfire makes more sense from an Amiga perspective.
I've been wanting to learn something about FPGAs as well, maybe using them in some sort of Amiga hack like a scan doubler or extended graphics system. I was looking at an experimenters board from XESS.com, but these guys
http://www.opalkelly.com/ seem more interesting. 400,000 gates for $200, with a USB interface... fun stuff. :-) I had this idea of taking the 12-bit digital data coming from Denise and sending it over USB2 to a pc for display... or maybe putting a PCI core in there and making the Amiga's Zorro II ram space a pci memory card...
