Would it make a difference in quality or latency(etc?) if I got a Swissonic midi-usb 1x1 for 13£ instead of, say, a M-audio uno or Emu Xmidi usb-midi interface for 23/30£?

Any help is greatly appreciated
at the v-drums board I have seen budget interfaces (for midi) crap out all the time...or even not work from day one out of the box...

I would say it's quite important to get a nice interface when it come to any type of gear, even for MIDI.

I run the E-MU in my studio and love it, there's a review in the pinned thread at the top of the board too.