At the risk of this becoming one of those threads where all of the power users express their sense of abandonment by Apple, I do have a question about the 5,1, and whether good options exist for improving the speed of FCPX. First, a little background. I am a computer hobbyist, but I don't use my computer for a living. On the other hand, I hate waiting, and I hate stuttering screens. I have a 5,1 that I have suped up over a few years, now with the following configuration: Dual 3.46 GHz 6 core, 48 GB ram, XP941 boot drive with several large spinning drives for data (photos, video project storage). I have a MacVidCards 7970 attached to a 30" ACD. Thanks again to all of the tips and suggestions gleaned from these forums! Up until recently, I could not have been happier with it. I initially used it for converting a bunch of Hi8 and Digital8 tapes to DVDs and archive files. Compared to the MacMini (maxed out 2.7 GHz 16GB ram, SSD), it cut my 1-hr export time from about 24 hrs down to a little better than real time. I'm done with that project, but my kids are starting to do all sorts of stuff with FCPX like object tracking, layering, etc. I was watching some of their stuff today, and noticed significant stuttering as they played back their video. They tell me that as they edit, they only keep the change that they're currently working on active to avoid this stuttering. Like many people here, I'm waiting with bated breath to see what Apple comes up with in the mMP, but I'm wondering if anyone has suggestions for improving their workflow experience. I plan to keep my 5,1 for quite a while yet, and don't mind spending a bit of money. From what I can tell, though, the Nvidia cards (even the new ones) are not likely to improve things at all in FCPX, and it seems that reviews are mixed with the 580x. I thought about getting another 7970, but last I looked MVC doesn't even sell them anymore. I suppose I wouldn't need a flashed card since my current card gives me a boot screen. Thoughts?