I got my bow from Schaffers this spring. Heres something to think about. You could spend $400 on a bowtech, but if anything goes wrong with it, you are looking at around a month or better before it gets fixed.
Schaffers has a layaway plan where you can pay it off and use it at their range until its paid off. But the most important thing that came into play when I made my decision, was the warranty. If you buy new from them, you will get a lifetime warranty, and service usually between 2-3 days. That could be the difference between bagging a buck and missing out on your season. From what I understand the Bowtechs parts can take a month or two to arrive.
I bought the Mission by Matthews Eliminator. I think I spent around $650, but I paid off over time. This route may be more affordable than you think. Good Luck!