I have been playing keyboards in bands and in my home studio for more years than I care to admit. tried the cheap road in recording. Had probs with a Tascam 2488 and now looking at Pro Tools. I am surprized to read that one big advantage between the PT Mbx 2 and the Mbx 2 pro is the addition of the firewire. This aspect doesn't make sense to me. How could latency be improved by adding a firewire in place of a USB. USB gets about 400 MB/sec. which is as fast as firewire. I know that more inputs and outputs are a clear improvement but worth the extra $200? Sweetwater techs tell me that the latency issue is helped by the firewire. I don't always trust those sellers, especially on this question because it seems USB should be nearly the same speed. I'm sure I could get by with two simultaneous inputs and every dollar counts. Anybody got input or experience on this subject?