I know this is a Mac forum so I won't ask for advice on the HP Z800. But I am curious about folks' thoughts on the Mac Pros. My needs center around a system that can handle intensive computations (on my Dell, a single computation will take close to a month, sometimes a little more) and acoustics. I want something that runs quiet and cool. The Z800 has liquid cooling as an option but I guess the Pro does not. I'm also disappointed that the Pro has so few USB plugs. My $700 Dell has more USBs than a $2500 Pro? Doesn't seem right to me. Anyways, if they release a new version next week as some suggest, I'll have to reassess anyways. So in the meantime, any thoughts and better yet, any complaints, would be great to hear. Thank you in advance!