You can either buy a "turnkey trading computer"... or put one together yourself and likely save >$1,000. Lots of us on ET can direct you how to do that. If you want this kind of help, you need to answer a few questions....
Will the computer be used for trading and/or other "lite" requirements... like web surfing, email, word processing.... or will it also be used for gaming?
How many monitors do you plan to run, what size monitors, and at what resolution?
Do you really need "monitor stands"? (They are costly, cumbersome, and you only pick up a few inches of space under the monitors.... and in spite of their "cool" look, generally not worth the expense and hassle, IMV.)
Lotsa luck to you and yours!