Better sounding drums will get you better sounding drums.
As for the mics, I'd think either option should work fine. They'll be a lot different in their applications, obviously. You're talking about a condenser and a hypercardiod dynamic (the Beyers), both with very small, compact diaphragms. Versus two medium-sized dynamics (sm57's) with standard cardiod patterns.
Being a smaller-diaphragm condenser, the snare mic you're using right now (
Opus 87) will likely have much better transient response than a 57 ... though it probably won't reject very much, and will pick up lots of hi-hat, I'm sure. The tom mic you're using will probably have a similar response to the 57, but being a hypercardiod, it will have a tighter pattern and will probably reject a good deal more.
Overall, though, I'm sure you'll get better transient response and a flatter, more accurate reproduction of the sound source with the Beyers. This could be either a good or a bad thing, depending on the source ... how they are used ... and your personal taste.
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