@Butrflynet,
One thing you might do to help you prioritize your computer options, is make a list of the top 10 functions for which you use your computer.
If you are mostly typing, not browsing or playing games then you probably won't be keen for one of the newer touch-screen features of new computers.
If you are mostly storing media such as photos, music and videos then you'll want the highest screen resolution, hard drive storage and audio output you can afford.
If you are mostly playing games you'll want the fastest processor speed and RAM you can afford.
If you're doing about equal time of all those functions, then you'll have to decide which components you can compromise on to keep your computer affordable unless you want to to all out on each.
This is a great desktop buying guide from CNET:
http://reviews.cnet.com/desktop-computer-buying-guide/