If you need R800 and V9990 anyway you might as well use them. But yes, Z80 with V9990 is more than enough to beat the NES. Just add in SCC or OPLL for better sound too.
Personally, I'd also prefer to see a good port using MSX capabilities.
if I want to run emulate NES software, I'll do it on my PC or phone. It would still be a great technical achievement though.
Good ports of even higher standards like the Ghosts 'n Goblins one are something I like too. But porting games individually takes quite a bit of time. With an emulator like this you could suddenly play all kinds of games in one go. So that is why I like this project.
Doesn't mean that I wouldn't applaud good ports or even improvements upon games (break shot is on famicom for instance or castlevania 2 and 3 to name a few)...
