Looking for an 8 bit FDC...

OK, I'm wanting to build a board with an 8 bit CPU (probably Z80, possibly 6502) and a floppy controller IC on board with the intention of hanging it off my PC (via serial or parallel, undecided yet) and allowing me to read and write *most* formats from various 1980's 8 bit micros... Intel's 8271 looks like a possibility at the moment, but I thought I'd poll the list for alternative ideas too. FM support is of course critical - MFM is less of an issue as the host PC can handle that. I've never built any kind of computer from scratch, so it'll be a useful experience. I figure on putting just enough code in ROM to support downloading of actual firmware to the device over whatever the link is to the PC, as that should save a lot of headache! Hopefully RAM requirements will be low enough that I can go the SRAM route and avoid messing around with DRAM refresh (although IIRC the Z80 has much of the necessary stuff built in...) cheers Jules