Not really a tough decision from my standpoint. To me the major PC manufacturers are all the same. I have worked for a lot of them. I curently work for Apple. The PC guys use many of the same component manufacturers so the only major diff is the logo. It's like choosing between Coke and Pepsi. Yes, they taste a little different but they are both colas and have more similarities than differences. You are going to find just as many people who swear by Coke and hate Pepsi as you are going to find Pepsi lovers.
Just look to see who has a sale going on and go for the best deal with the specs you want. You do not sound like a tech head who "OMG, I cannot use a computer that loads a game 0.001 seconds slower than some home built PC."
If you are even less picky then you can save even more gil by buying a refurb model. Of course you cannot customize it but you might get lucky and find a refurb that suits your needs.
The only thing I really dislike about buying a PC from Dell or HP is the bundled software. There is a lot of junk on there that just takes up unnecessary disk space and some do annoying pop ups upon start up asking you to subcribe to their service.
I would much rather buy one of the Dell "Open Source" desktops which come without an OS installed. This way you can load in your own bare-bones Windows OS or maybe even choose Linux or w/e. It's much nicer to know that the only stuff on your PC (and slowing down your PC) is stuff that you personally installed.
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