Yes, a few.
1) The Rava is cheap because it's sold on the Internet and not in some local audio store. However, if it were sold at a local audio store, what would be the price tag? $1,000? $1,100?, $1,200? If it were to be sold at the retail level, "middle men" would get the price of the Rava up there quite quickly.
2) The Rava uses the very popular Shiva driver. This is a very capapble driver. The Shiva is also a very good driver and worth every cent.
I think the Rava would make a nice purchases. Plus, if you were to hold onto it for a few short years, I'm sure you'd be able to sell it for a good price. But, I suspect that you'd be quite happy with the sound and make it a permanent part of you music/home theater area.