I owned an No.39 for 3 years, during which time I went back and forth on the issue of running it direct vs. using a separate pre-amp. There is a clarity and purity and image stability you get by running direct, which is mighty appealing. But when I would add a pre-amp, I always appreciated the extra ooomph I got out my system. With a high-gain amp or highly efficient speakers, it might have been a different story.
The Levinson is a great product, but it may be getting a little long in the tooth when it comes purely to the sonics of CD playback. In order to get it all in one box, including volume control, I don't think you will be getting the best CD playback available for $6K. The No. 37 transport in it is superb, but the No. 36 DAC is fair to middling by today's high-end standards, I think. -Dan