WOW, like what type of trading are you doing?
I use to get custom built stuff all the time, what a waste of bucks. Now I have two laptops, one for charting and diff for platform, doms, buy them on black Monday, 2 of everything so I have backup each year. I just make sure it has min 16 gig ram, wired mouse as I need middle button, I don't like wired mouse at all, too small for my hand. I don't have any DVD rom, no extras, one is 17 inch screen and other 15, internet want fast, but it always comes down to my speed of identifying signals and not so much as equipment. I like the SSD and I get 500 or smaller, even on email laptop after 3 years just used 90 gigs. Hardest game I play is hearts, LOL. If you day trading 1-2 markets, don't need extra monitor, at least me.
Getting fastest CPU great for back testing, but data only comes in so fast.
I suppose if you day trading stocks, much data trying to go in.
Why not just hook up to 60" wall monitor? Lots of real estate there?