I'll throw in more confusion by suggesting
the Beyer M-88 is worthy of consideration, and pretty cheap these days. A classic on kick, good on bass, very good on electric guitar, great on some vocals, but I wouldn't suggest it for horns. You can often get new ones for under $200 on ebay.
The Stedman N-90 I'd rate as interesting. Pretty similar to an RE-20 but without the Variable-D design, so the proximity effect is there where it is lacking on the RE-20. IMO, not worth it new, but people off them for $150 often, and at that price it's an okay buy. More a "filling out the closet" sort of mic, and not something I'd prioritize. I'm still not selling mine, though.
Also, some but not all of the standard kick mics are large diaphragms. Not as versatile as any of the suckers we've been chatting at, but often good at bass amps as well.
Still, of the bunch, I'd tag
the MD-421 (old or new) as probably the most versatile pick.
Bear