Dell for all desktops and servers (although this may change, had a nightmare of a time with our latest round of boxes as Dell switched all Dimension models to Vista only. Upper management decided that the best time to begin integrating Vista was the day 12 new vista machines showed up from Dell for a batch of new hires. 160 man hours and 12 clean installs of XP later they decided that we *might* actually know what we're talking about when it comes to roll-out decisions ) For misc parts we use Newegg, good prices, good customer service, and they're willing to work with you some on the price if you do a lot of business with them. (I've even had them give us bundle pricing on items when we don't technically qualify for it)