Quote from glenjohnson:
1. Brand new computers don't make noise. (not sure what type of computer you have that makes noise)
2. New monitors don't have glare. New monitors are all made glare proof. (if you see glare, close the drapes)
3. New monitors don't give off electomagnetic radiation. Old style might. But you should buy all your computer equipment brand new straight out of the box.
Never buy used equipment. Computers are so reasonably priced these days, it is not hard on the wallet when it is time to purchase a new computer. You can get a whole set up with one monitor for under 800.00 for a good computer. If I were you, I would wait until the NEW WINDOWS VISTA comes out around Christmas time to buy a new computer. Buy the fastest one with the biggest hard drive space. Buy it already assembled from a department store or computer store. Just in case it doesn't work, you can return it. Don't let somebody build you one.