Hi Gang!
I just wanted to point out to the other forum members that I've been given negative karma for my last post.
Both 'mydogrizla' and 'beezwakks' felt the need to give me negatives based on my post.
I really don't care about "karma" points or whatever, but I think it's immature to do such a thing. Heaven forbid I side with the developers of MV - they have a ton of work on their plate and it takes time to improve software. I have met Patrick, Paul, and Eric in person and they are good people. They are dedicated to MixVibes, and I think they do a heck of a good job based on the amount of work they face everyday.
I'm more than happy to share my experiences with MixVibes, as I own a full spread of equipment and maybe I can help those that are running into issues. Aside from owning (2) RME Fireface 800s, I also own a U46MK2, a Stanton FS Open box, and my best friend owns a U46DJ rev 1.
My latest project has been putting an audio partition on my Thinkpad T61p, and optimizing it for ASIO use. Just like anything, it took a lot of time to really unlock the potential of my hardware. This takes a lot of patience, technical know-how, and reading. Not only did I find great performance gains by making adjustments to power management, graphics adapter, etc, but I also had to figure out a way to circumvent the fact that the Fireface 800 was sharing a virtual IRQ with the graphics card.
The only point I'm getting at here is that if you really want to get to the bottom of your issues, you have to be tenacious. I probably spent 20 hours in total over the course of 2 weekends, but as a result I get 1.0ms latency and performance that is so close to realtime that it's amazing.
For dratic backspins we are studying the differences between the versions to improve the real time DJ feel in the next update. 
idorio