I see nearly everyone on this site that is 10 boxing WOW is using one computer, built around the i7-3930 with a 4GB video card and a minimum of 1GB per toon.

What are the comparative disadvantages to 10 boxing with 2 computers? As near as I can tell the cost is about a wash.

As info - my spec for 10 boxing on 1 Comp would be something like

Single 10 Box Comp
Processor Intel Core I7-3930K $500
Graphics EVGA GTX 670 4GB $420
Motherboard Asus P9X79 or Gigabyte X79 Express $220
Memory 16GB 1866 DDR3 $150
System Drive OCZ Vertex 4 128GB x2 $358
Storage Drive Reuse current HD $0
Optical Reuse current Drive $0
Case Reuse current Case $0
Power Reuse current 750W PSU $0
CPU Cooler Noctua NH-D14 cooler $94
Total Cost $1,742


Versus me building two identical computers like this (based on the toms hardware game builds for 1Q 2013)

Dual Box (2 Comps 5 Act Each) x2
Processor Intel Core I7-3770K $229 $458
Graphics EVGA GTX 650TI 2GB $169 $338
Motherboard ASRock Z77 Pro3 $95 $190
Memory 8GB 1600 DDR3 $53 $106
System Drive OCZ Vertex 4 128GB x1 $179 $358
Storage Drive Seagate Barracuda ST500DM002 $60 $120
Optical Samsung SH-224BB: $18 $36
Case Xigmatek Asgard II B/B $34 $68
Power Antec Neo Eco 520 $55 $110
CPU Cooler Rosewill RCX-ZAIO-92 $15 $30
$907 $1,814

Of course I am using ISBoxer and Jamba.