shinybox make some pretty sweet ribbon mics. I've got a 23 myself, and it's beautiful. I'd imagine the 46 might be more convenient because it's smaller and won't weigh down your boom as much (especially if you get one of those 5 mic stand packages from sweetwater or something)
i wouldn't get any more 57's.
you can always just take the grill off of a 58 and have pretty much the same thing.
the md421 is a pretty staple choice. i also really like the md21, which is a little less common, but sounds way better than a 57 for about $100 on ebay.
ev re20 is supposed to be great as well. you could also go down the akg d112 route, which is a solid mic for kickdrum and bass. depending on your circumstances, you might only want to pick one of them though. ev pl20's are good too, and i think a little cheaper.
i'd also like to add that getting 3 of any one kind of microphone will be less exciting than getting 3 different microphones.
definitely get a Beyer M201.
i'm not sure if there are still quality control issues with Oktava, but you may want to get a matched pair of MK012's for drum overheads. last i checked, they were $300/pair on ebay.
hth
that damned fly wrote:digital is fine for a couple things. clocks, for example.
and
mashups