use the site to look for the best parts? your on a tech site that specializes in reviews and has a lot of graphs that can be used to compare.
Basicly you have to get a strong cpu, at least 4 core. The amd 6 core can be a good choice or go for the intel 2500k/2600k. They cost a bit more but are also very good with overclocking.
SSD just look for a decent size, at least 100gb to give you ample room for fast work.
The 1 tb disk is more of a personal choice rather a very critical one.
Get a decent case for the sound, p182/p183, or any case that has a decent set of fans + good build quality.
For the videocard go for nvidia I guess for the cuda option. Pretty much any card around 200 or more will do the job.