Moving to HD - need advice

I've worked with HD footage but mainly just as royalty footage. My workplace is now moving into full HD for all events. (weddings and stuff). I've done lots of research on editing with HD and we are getting new computers. I know that it's a strong system but I want your advice about how good you think editing HD and working with After Effects, 3dsMax, Vue 7 etc... will work on this system that was recommended to us:

HDStorm Plus - incl. EDIUS 5 (We work with Edius)
Main Board Intel Chipset, Intel Core i7-920 2.66 8M 1333
Total 12 USB-2 Ports for Device Com.
Professional Low Noise Case 2x 12c Fan.
HEC 500W True Power Supply.
2x Front USB, 1X Front Firewire Port.
2x 2024MB DDRIII 1066, Kingstone.
NVIDIA 9600GT Display Adoptor.
DVD Dual Layer x18
250GB SATA II System Drive.
2x 1000GB SATA II Storage Drive
Giga LAN 10/100/1000
Hi Definition Audio Codec

(p.s. we have 20T of external HDDs so storage is not an issue)

Thanks!