I traded for 8 months with :
- J-Trader
- AMD XP2000+ processor
- Windows XP Home edition
- 512 DDR mem
- 60GB 7200rpm HD
- Cable internet
- Matrox G550 Dual Head / G200 MMS Quad card
- 4 Hyundai 17" monitors
I used J-Trader as backup for IB.
No problems at all.
Hope this helps