There are only two extra things I would like this rack to have. First, the DB25 or at least the TRS along with the XLR connectors, and second, a front power switch. I was a little reluctant due to the fact that the power supply is internal, but the background noise I have with the Elysia Xfilter is about -94db, so it is very small. I haven't tried a preamplifier yet to see how much the noise will increase, but it's very well built and I don't think it will be a problem.