I'm running a year old mini with 10.6.4 OS and 2.26 GHz processor and 4 GB of RAM and I'm happy with it's performance running all the typical stuff, as well as CS5 and LR3. Runs fine and fairly speedy. Here's what it's got: Hardware Overview: Model Name: Mac mini Model Identifier: Macmini3,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.26 GHz NVIDIA GeForce 9400 L2 Cache: 3 MB Memory: 4 GB Bus Speed: 1.07 GHz Boot ROM Version: MM31.0081.B06 SMC Version (system): 1.35f0 But now, I've got to wonder if I would notice an improvement in running Photoshop filters (like Portraiture) or in finder activities if I upgraded to the 2.66 GHz Mini with 4GB of RAM. Looks like the only performance improvement other than processor speed might be the graphics processor? And ability to go to 8GB of RAM, though 4GB seems plenty to for what I do. * 2.66GHz Intel Core 2 Duo processor * 3MB on-chip shared L2 cache * 1066MHz frontside bus * NVIDIA GeForce 320M * 4GB RAM graphics processor with 256MB of DDR3 SDRAM shared with main memory4 Your thoughts on that? Noticible improvement or hardly noticible?