Just get the cheapest base model T3400 you can live with from the outlet and do the upgrades yourself. It's cheaper that way. I got a cheap Precision 390 from the outlet and upgraded the CPU, RAM and HDD myself and sold all the junk on eBay.
"In order to make great sums of money, you must first learn how to lose much smaller sums when you are wrong." - Paul Tudor Jones
In other words, don't blow up.