I love my 012's (matched pair from sound room). I do think you should give a listen to MXL 603 as well. For overheads, either will work. I think the matched pair is a better choice for XY or spaced stereo micing. If you're just looking for overheads as part of a drum kit, random 012's or 603's *should* work nicely. If you need real stereo mics, as in remote or choir setups or X-Y on a guitar, get the matched pair, the nice cedar box, and pay the nice engineer for his work matching these mics. Either way, I'd go to GC and buy one 012, you can easily talk them to $99, and even if you don't have the pair, one 012 is a very useful mic.
Try the one 012 on acoustic guit, on the 12th fret, with an MK319 over the shoulder. That combo is lovely.-Richie