Though I have no experience with these mics, many are hailing the HEIL PR series...
PR20,
PR30, and
PR40. All under $300 too.
I'm going to give one a shot soon...they're "mission is to re-invent(?)" and build really killer dynamic mics, and I'm in the school of thought that high quality dynamics are far superior to cheapy chinese condensers...many agree as well.
Not that I don't own any chinese condensers, I think you just have to be really picky about them...I narrowned down and ended up buying an MXL V69me(tube swapped it with NOS), and it's an insanely great mic, and I own Studio Project C4s, another great pair of mics.
Good dynamics I like/own include the EV RE-20(maybe my all time fav.), MD421, and I did a "TapeOp Mod" to an SM57 that supposedly makes it sound more like an SM7...lower output, but better bass range and smoother all around. It needs more gain like the SM7, but through a nice pre it's a great little mic.
Another really great option, and probably my best quality, workhorse mic is a true Russian-made Oktava MK319($250 or so) that I had Michael Joly at Oktavamod.com mod for me. Post mod, it is absolutely in the league of AKG/Neumann stuff. The mod costs $99, so for $350 total, you pretty much walk away with a close-to AKG C414. And there were 2 articles recently claiming the "Joly-mod MK319" as
the u47 FET's Russian cousin, and another review hailing it an easy win over the Neumann TLM-103. Save some serious loot and get some serious quality too. Turnaround is ultra-fast; 3 days or so. I love my Joly MK319!
Yeah, I'm all about the mods. You save so much money for a custom product, how can you beat that?
I'd say check out the HEIL mics, and if you do, tell me what you think 'cos I want one!
Good Luck!