Please help me pick a GMAT course!

Hi,

I know this topic is a fairly common one and that there are a variety of responses available out there, but I am hoping someone can sort of "show me the light" based on my background and skill level. I gave the GMAT last year in November with very little prep, or rather, by giving myself a single shot and placing all my hopes on it. I was hoping to apply that year. Obviously, I did not do well (scored a 640), because of lack of sufficient prep and way too much pressure that I was putting on myself. I am now ready to give it another shot after a nice long break but find myself lacking the motivation to prepare on my own. I was considering taking a GMAT prep course to motivate myself to study regularly. I attended one Kaplan GMAT class in October 2010 just to get a feel for what the class is like, and did not like it at all. I felt the class progressed at a really slow rate and I just did not see myself improving by attending Kaplan. A friend of mine told me Princeton Review was way better, and so was Veritas Prep. Can someone please tell me which one is better? As of now, I have ruled out Kaplan, MGMAT(too pricey). I considered Knewton, but that is online only and I am more inclined towards a classroom course. So, I seem to have narrowed down to Veritas Prep and Princeton Review. Any advise would be greatly appreciated!