If he's going to buy his own, I'd suggest the XLR model, not USB - for a multitude of fairly obvious reasons I won't get into here. If you or he (or wherever he'll be recording) has a preamp or interface, then XLR is the way to go imo. I believe they updated that 2020 mic to the 2030? I think the main difference is the update has a -10 db pad and a high pass filter switch. Which would be ideal for close micing rap vocals. The pad helps the mic not overload and distort (yes the mic can distort too before the sound even gets to the computer or soundcard/interface, which you can't control with a volume knob later). The low pass filter will make it clearer sounding in the low end so you have less post processing to do and the vocal sounds just a little closer to the finished product as it is going in.
I have the 2050 version which is the multi-pattern version of the 2030 and it's been great for me for most vocal applications, room mics on guitars and as an outside kick drum mic. It works on acoustic guitars fairly nicely too as it has that presence peak our ears tend to like on things like acoustic guitars and vocals.
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