Originally posted by: JustaGeek
HP is as good as Dell or better, and any potential upgrades are much, MUCH simpler, since they are using the off-the-shelf components, as opposed to proprietory by Dell.
Just my 2 cents...
		
		
	 
Proprietary what? When you buy the Gold tech support there's a 3 year warranty anyway. Parts go bad and you get them replaced overnight. Their systems support any expansion card whether low profile or standard. 
When I was in the USAF we had Dell for the longest time, started out with Optiplex GX1 workstations in fact. After the GX270s they went to HP. I remember trying to get an old TNT2 video card to work in the HP so I could have dual monitor support. No matter what I tried or what HP tech support told me to do it wouldn't work...even though the TNT2 worked fine in the GX270. In the end the HP tech support told me if it wasn't HP they wouldn't support it.
As a civilian at my current company we have Dell Optiplex GX520 and 745 workstations. I don't have any problem with them and through the Dell online chat support I don't have to wait and get parts with very little resistance from the Dell tech, unlike HP's support. 
I personally dislike HP/Compaq quite a bit and would never recommend them over Dell.