Hi, I am in the market for a new mac for audio production and am not sure what to get. I am considering the new i7 imacs but the lack of expansion worries me. I could also, for a few hundred dollars more, get a 2008 8 core (2xquad core) mac pro second hand. I have heard that these work better with audio at the moment because there are problems with hyper threading in the 2009 mac's. However what concerns me about getting the MP is that it will be "obsolete" in a year or two's time. I mainly will be using logic 9 with lots of software instruments and pluggins loaded so processing power and ram are very important. However, I will also use pro tools le 8 for mixing, which tends to work better with a second internal drive rather than an external firewire drive (my only choice on imac). I have also heard reports that hyper threading doesn't work too well with pro tools and audio in general but that may change when things start running natively at 64 bit. Anyone got any thoughts on the matter?