What are you using now? I went from a Rogue 99 Magnum to the Plinius around the beginning of the year and, at any rate, I'm still using the Plinius. Between the two, the Plinius is a bit more focused with a more precise and detailed sound stage, and definitely has better bottom end control and extension, but I wouldn't say that there were radical difference between the two of them in my system. Also, the Plinius definitely has a more defined, forward and engaging presentation than the Rogue.
Truth be told, I was also looking to tweak the system from a little too laid back towards the more engaging and ended up doing a whole lot of things around the same time period to push it in that direction. Mainly, added a lot of isolation under the preamp and CDP and after-market power cords to everything and then, a little bit after that, ended up swapping in the Plinius (largely for other reasons). Although it all runs together to some degree, I have to admit remembering that the wires and isolation tweaks had a more appreciable impact than the Plinius. Yes, the Plinius was part of the path that took me where I wanted to be (or, at least, where I now am) but the other stuff took me most of the way there. I just mention this as, depending on what you're using, you may find there's an easier (and cheaper) way of moving towards where you're going.
Finally, although you probably know, there's at least three versions of the CD-LAD floating around. The original Mk.1, an upgraded Mk.1, and the Mk.2. Avoid the Mk.1, by all accounts -- the sonic upgrades they did really are meant to be worth it. An upgraded 1 and a 2 (assuming all the upgrades were done) are electronically and sonically meant to be the same. However, physically, the 2 chassis has a home theater bypass loop while the upgraded 1 don't -- if you want it, the 2 is the only way to get it. (I have an upgraded 1, but kinda wish I had the HT bypass loop...).
As for the Bryston, I've used a Bryston amp for years and love it. A big fan of Bryston, in general. Haven't ever heard the preamp, though.