The caps have nothing to do with what accelerator you can run, it's the timing fixes you're thinking of. That being said, you should always get the caps replaced with some high quality ones. It's cheap, instructions and parts kits are readily available, as are folks who can do it for you if you lack the tools, skill, or time. There've been dozens of threads on this recently, already.
That being said, if I was building an A1200 system personally and wanted an '030 specifically (whether that's for greatest compatibility, cheapness/lower cost, or whatever) l I'd look for either one of the Blizzard cards or an ACA. Coupled with a good CF card, an Indivision, and 3.1 or 3.9, you'll have yourself a pretty decent and capable Amiga system, without all the expense and hassle of trying to towerize it, add a busboard, etc.
Of course some people like that challenge.
Good luck, have fun!
