Hello, I've done some reading and research here but have a question. Per: http://www.123macmini.com/forums/viewtopic.php?t=20069 There are two 1.83 dual core processors avaiable, the T2400, and the T5600. Comparing them both on Intel's site, it just seems the T5600 is 64 bit, which shouldn't matter I would think with my old core-solo mac mini which is 32. Is this the only real difference between the two? I also noticed the t5600 uses twice as many transistors. Does that mean the T2400 isn't really a 'dual core' but is instead a normal Pentium chip with hyperthreading pretending to be a 2nd core? I'm just trying to upgrade my mini a spec to speed basic things up. Like word processing, general web browsing, and i'd like to support Hd videos (either .mkvs, or 720p youtube videos, the 1.5 ghz solo stutters horribly with these). I'd hate to drop some money on a processor which doesn't do much more than my current 1.5 solo.... Don't do much gaming on it, I have a fairly well equipped PC for that. Any input would be helpful, thanks!