In the process of building a HT in the 20-25k range, and I'm leaning towards M&K's S-150P + MX-5000 sub for the 5.1 speaker system (no amp needed!). So, next is the decision on a quality pre-amp as I believe I won't need an amp since the 150P's have an internal amplifier, am I right? If I am right, my budget for a good pre-amp is in the 3-5k range. Any recommendations? Thanks in advance!