For CPU, why not get the i5-3570? It's slightly faster, and not much more expensive.
Newegg.com - Intel Core i5-3570 Ivy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 2500 BX80637i53570
I think 32GB of RAM is nice, but 16GB may suffice. Remember in those 32-bit days, we had only 2GB (3GB with hack) of accessible RAM, and already large orchestra libraries were possible. Now, 8GB seems to be the comfortable limit. I have never seen anyone need even 16GB. If you are indeed loading in that many VSTs with large libraries, I suspect your CPU may bottleneck first.
For SSD Drive, 120GB will run out pretty fast if you intend to store install your sound libraries there. I'd suggest getting a 240GB SSD for all programs and plugins. Then you can have blazing fast loading speed. Yes it's twice as expensive, but if your projects contain VSTis using samples from large libraries, it would suck to have to wait up to a minute while waiting for the computer to load all those sample libraries from slow HDDs. Also, I believe Samsung is the current leader in value-for-money SSDs.
Newegg.com - SAMSUNG 830 Series MZ-7PC256B/WW 2.5" 256GB SATA III MLC Internal Solid State Drive (SSD)
For HDD drive, I think WD Black is the way to go for speed.
Newegg.com - Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive