I would suggest that you just go ahead and buy the M3's. You've got 30 days to return them, no questions asked. They are pretty small, so if you decide you don't like them after all, then you won't be out too much in shipping costs.

The M3's are a fantastic deal. I have a pair of M40'sm which is basically the M3s with a bigger cabinet. I couldn't be happier with my purchase.

Well, whatever you choose - good luck!