I've searched your products and they are by WebNX and I suggest you personally go with the offers below from them.
Dual CPU Xeon 5420 (8 cores at 2.5ghz) 12gb ram, 4x 1TB w/ raid 10(2TB FAST Space) $229
Dual CPU Xeon 5420 (8 cores at 2.5ghz) 24gb ram, 4x 450gb 15k sas w/ raid 10 $289
These are physically 8 cores not logically
There are some architectural improvements that came in with Westmere for lower virtualization latency, so E56xx CPU's would be better than the E54xx, E55xx, X34xx, or i7-8xx for building a VPS node. Either that, or go for a new E3-12xx.
ASTUTE HOSTING: Advanced, customized, and scalable solutions with AS54527 Premium Canadian Optimized Network MicroServers.io: Enterprise Dedicated Hardware with IPMI at VPS-like Prices using AS63213 Affordable Bandwidth Dedicated Hosting, Colo, Bandwidth, and Fiber out of Vancouver, Seattle, LA, Toronto, NYC, and Miami