I am looking to up the quality of my "mbox 2" "usb 2" set up. I am willing to spend around $1000 for a quality preamp, but I get mixed messages. Some people tell me to get a higher quality a/d converter before I spend too much on a preamp. But I figure since my set up only allows for 48k transfer rate, that I should focus on getting some nicer preamps first. Is there a huge difference between 48k and 96k sample, if so what is the fastest possible sample rate? I'm recording violin, voice, guitar, and bass. I've been looking at the following equipment: Preamp UA LA-610 a/d converter API A2D Dual 312 Mic Preamps with Digital Output I would be getting the api used from a friend... any suggestions?