Hi all been lurking around trying to catch up on the latest lines. I havebeen in the market for a new mac, I currently have a MDD DP, '01 vintage running 10.2.8. I have been considering a newMP for awhile, but decided I could hold off until the new Nehalems came out. I've been fairly discouraged by some of the comments about high prices vs. performance, but I'm not a cutting edge user anyways. But I have no problem shelling out cash, because computers last me 6 - 7 years anyways. But in the latest configs, is there a general rule of thumb on performance? I see references to 4-core, 8 core, etc. and then the different speeds. So are two 4-cores considered to be an 8-core? Is this the same as a dual processor? Is a Quad at 2.93 "better" than an octo at 2.66? My guess is it depends on the OS, program and ability to optimize parallel processing. I do a fair amount of video editing, some games, I'd like to get in to some CAD type stuff too. Right now I have my eye on a 2.66 Octo (2x quads, right?), fairly high in the line, but I guess I am holding out for Snow Leopard. So thanks for your kind patience in educating a noob.