Let me preface this post with the following: My current machine is a G4 tower 933mhz with 512mb RAM. The tower is for grad school. I do not consider myself a gamer AT ALL. My future machine will be used for photoshop 90% of the time. The other 10% will be split between playing shredder chess, web surfing, paper writing and playing DVDs. Possibly I will be doing video editing....using whatever pro programs I might need. (Ths is a slim possibility) The photo files I use are around 1.5-2 gigs. 16bit color etc. As soon as Photoshop CS3 comes out I will have it. I'm set on getting the 2.66 tower with 160gig HD. My first question is: What graphics card do I get? I've heard that it doesn't really matter for photoshop. I'm pretty sure that whatever I get it'll be an awesome upgrade from what I have now. Again, I DON"T GAME. Question 2: What happens if I get 2 sticks of 512 ram and then upgrade with 1 gig stick later? Do I lose performace? Will I have to/Should I buy 2 512s later. Question 3: Does installing your own ram void the extended warranty? I don't think it does but I'm not sure. ----- This is my first new computer since 2001. I don't mind spending a bit more but I'd love to keep everything under 3 grand. I really appreciate your input. Thanks T.