You could change the processor from i7-860 to i5-750 since its only about 10% difference in performance. I'd recommend a 24" monitor like the ST2410. I guess you would save at least $55 like what JackNaylorPE said. You would also get a better computer case of your choice if you DIY.
Oh yeah, Tom's Hardware guide of best gaming processor for this month was where I got the i5-750. I've thought of Dell but instead, thought of building my own. You could check my post =) Also, the chipset for the mobo is H57, what I picked was a P55 which is better for overclocking. My rig, also includes a better cpu fan for the same price.
Hyper-Threading is for programs that are threaded but not really an increase in performance. And the 860 has a price tag of a i7-930, I really don't think its worth the money. 750 would be the best bang for the buck!