So, assuming you've got those dynamics plus the Shure drum mics, here are my two budget-conscious recommendations:
1) You're gonna want something for vocals. Like I said on the other thread, I'd get an RE20. It's just not even fair that they only cost $350 or so. You could put it in front of the kick drum on an aggressive rock song, and then pick it up and put it on a stand and sing a whispered, intimate, soulful lead vocal into it, and it can sound GREAT on both.
2) At some point, it would be nice to have a ribbon in your locker. I mean, if you're sending aggressive rock guitars to digital converters, ribbons do something to that signal that you want... sort of rounds it off in a way that keeps the aggression but loses the unpleasant harshness. Ribbon mics were mostly a historic footnote until recording mediums went from tape to digital, and shortly after that, the Royer 121 ribbon mic became a worldwide studio standard for electric guitars. Royer now makes a model called R-10 for $500 that to my ears sounds identical to the more-expensive 121.
There are ribbon mics now for every budget. Cascade Fatheads are pretty cheap and have become popular (I've never used them). There's a Nashville-based mic maker called Stager who is still kind of a new company, but I've heard rave reviews about Stager mics from engineers who know their shit. They also make a model for around $500.
Just to back up a bit and explain those two choices, here's why:
You can use your home rig to record your demos, work out parts, play around with instrumentation and arrangements, etc. When you're ready, book a studio, hire a great engineer, and cut your tracks. You can rent as big a room as you need... one with a grand piano, a B3... whatever backline you specifically need. Then take those tracks home again (this is where the RE20 and the ribbon come in) and do your guitar solos, overdubs, harmony vocals, etc. Maybe hire that same engineer to come to your house for half a day and give you advice on guitars and vocals. Then you're off the clock.
If you're doing a lot of acoustic instruments, I agree with jj that a small diaphragm condenser like Josephson would be great.