c9, in just the way you could say you've found a better pre in the Tampa for Hip-Hop and R&B - because the Tampa is cleaner than the RNP and the Vintech - it's not too wild of a stretch to list some mics that are cleaner as well.
The MXL V69ME is a great tube mic, very colored and dark. It's not that great for Hip-Hop in general, because that type of music is usually tracked cleaner. Sure there are Neve's and colored pres used for Hip-Hop, but they are the exception rather than the rule.
And with that, I think it makes more sense to recommend to someone who's looking for a good mic under $500 for Hip-Hop/R&B that they should consider a cleaner, more neutral mic. Some of the mics in that price range we have here that are performing well on that type of music are the AKG 414 TLII - which you may be able to find used for under $500. The ADK TL [ transformerless 4-pattern ] is proving to be an excellent mic on Rap tracks. The Shure KSM series offers a smooth, clean sound.
The Studio Projects T3 offers a sexy hyped sound, and if you're doing R&B more than Rap, that might be a good mic to consider. The T3 offers 9 pattern variations for a lot of tonal variety. The cardioid-only Neumann TLM 103 is more colored, can also work well, but probably harder to find used for under $500.
The one mic under $500 that I'd personally choose as a general mic for a Hip-Hop studio would be the ADK TL. With Rap you're also going to often have "gang" vocals - and the figure-8 and omni patterns are perfect for that.
My 2 cents.