MIDI latency is a pain in the ass, audio latency is negligible with any USB soundcard I've used, buffer sizes and latency compensation in DAWs matter. Adjusting your MIDI timing to compensate the jittery of MIDI on a PC is also important.

Or get an external MIDI clock like the E-RM Multiclock and never bother about MIDI latency issues. Audio is completely fine, 30-50μs of latency won't ever be perceptible to humans, the latency of MIDI will.