Once again, my thoughts are on getting a new desktop system, to be used almost exclusively for photo-editing/post-processing. I used to enjoy piecing together PC's from the best components I could find, but don't have the patience for it anymore. I don't mind doing things like adding hard drives and Ram, or swapping videocards, though. So, I'm looking for a complete system (less monitor) - but hopefully one with "upscalability" - that is able to accept more Ram, a second hard drive, perhaps a vidcard, etc. I've come across these two at Best Buy: http://www.bestbuy.com/site/olspage.jsp?skuId=8886967&type=product&id=1212192194514, and http://www.bestbuy.com/site/olspage.jsp?skuId=8886976&type=product&id=1212192194580, and am seeking opinions as to their suitability for my needs. The differences between the two seem only to be a faster processor (1.8 vs 2.2) and 2 Gigs more Ram. Price difference is $100. Note that I use Capture NX2 and PSE5, as my main apps for post-processing, and Photomatix for the occassional HDR and ACDSEEPro2 for my DAM app. This system comes with 64-bit Vista SP1, which leads me to a few questions: 1. How big an adjustment (ie - learning curve) is there in moving to Vista from WinXP? 2. How difficult is it to find 64-bit drivers for existing hardware? - specifically, an Epson Photo750 printer? Does Vista come with a slew of (64-bit) drivers built-in, like XP does (with 32-bit drivers)? 3. I've read of some having difficulty running NX2 on Vista64. How widespread are the problems and have they been worked out? Finally - how much faster would either of these systems be than my current system (an AthlonXP2600 which runs at a clockspeed of about about 2.133, and is maxed out at 1.5 Gigs of Ram). Any thoughts on either of these systems, plusses and minusses, would be appreciated. Thanks!