Aaron
I have been building PC’s for myself and friends to use as edit stations for over 15 years.
I usually ask them a series of questions about what they actually want to use it for (Premiere, AE, p/shop, animation etc, also source footage: – AVCHD, DSLR vid, P2, SD etc) and taylor a solution to fulfill their needs.
For P5.5 your system will blow it out of the water but at a cost.
If you can expand upon the source material you want to use now and in the future we can advise better.
Col Lamb
UK
Own build custom PC ASUS x58 MOBO, 12Gb RAM, GTX 580 GPU, RAID 1 and RAID 0 in PC + Store HD, Boot and store in trayless caddies for easy swap, Synology network RAID storage