Please pardon me if there is any mistaken protocal as this is my first post here. I presently own a late 2006 iMac I purchased new through Apple. It is getting a little long in the tooth and I need to upgrade. I am by no means an Mac expert and have to keep a Windows based computer around just to do some things that I have not been able to figure out how to complete on my iMac. I have managed to save enough up to buy a very high end 27" iMac or have found brand new Mac Pro's with two quad core processors, 1TB HD + 240GB SSD, Blu ray burner, good video card, Apple Care etc for about $4000.00. Here is a link to said machine. http://www.ebay.com/itm/180781438945?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 The BTO iMac through Apple was going to set me back about $3400.00 + $100.00 at OWC for additional ram. ($3500.00 total.) I presently own a Viewsonic monitor I could use until I can save a few more dollars to purchase Apples 27" Cinema Display monitor. And I would have the additional expense of having to purchase a decent set of speakers. What I like about the Mac Pro option is the ease to upgrade and with two Xeon 3.2Ghz processors & 12GB of ram, it should blow away the fastest i7 processor the iMac will have. What I do not like about this option is the amount of real-estate , wires that I will now have to put up with. And of course the additional funds I will need to spend for a new monitor, speakers, additional HD;s and perhaps additional ram. I love the convenience of my present iMac, but hate the almost non existence of upgradability. (Hard drive and ram exception) The newest model iMac is a beautiful machine, but seem to be even harder to get into than my late 06 model. I also am reading about dust getting behind the screens of the newer model iMac's and Apple Care not taking care of this. This is worrisome to me. Is the dust I keep reading about behind the screen just a fluke on a very limited number of machines? Or is it a design flaw that may disappear on the next version? I do almost no gaming. But I want a blazing fast machine that does not blink with whatever I throw at it. I spend most of my time browsing the internet and checking Email on the computer. But I also spend a lot of time with Photoshop rendering pictures. I am going to wait until the new iMacs come out hopefully within a couple of months. I am hopeful that a new Mac Pro will also come out first or about the same time. My question is are the Mac Pro's worth the extra money if I can afford it? Are the high end on board GPU's for the iMac really high end? Is the dust behind the screen really an issue with the new iMac's? I can only afford a new high end machine about once every six years. I prefer less of a foot print, but not at the sacrifice of noticeable speed. So will I see an amazing speed difference if I purchase the Mac Pro? Sorry that I have so many questions. I want to choose correctly. And some of you may have advise or some insight I may have missed. I would love to hear your opinions on which machine is the best value as well as the best machine, and why. Thank you.