I have an Early 2008 MacBook and just got a set of M-Audio AV40 Studiophile speakers and am loving the sound on them. However, I am wondering if they'd sound even better if I ran audio via USB to them. If so, any suggestions? They have L/R RCA line in, L/R 1/4" TRS, or 1/8" aux in. I think I saw someone said they were using a Behringer UFO202 Audio Interface ($30 from Amazon), but I'm unsure if this would work on the MacBook.