If you want to stay in the shorter/bullpup form factor, the Benjamin Akela seems to be a good gun to look at as well. This coupled with the fact that the Crosman site currently has them in stock, and using the AGNATION discount coupon, you can pick one up for just over $400 shipped to your house. Crosman's 5 year warranty makes the deal even better.
I don't know whether there are a lot of them out there, but I also have one of the Benjamin Recharge compressors, which continues to serve me very well. It is not inexpensive, I don't know whether it is in stock and I don't think that the discount coupon works for those either. I actually got mine through Optics Planet, the only purchase I have ever made through them, but they had the best price and units in stock. (Unlike the Crosman/Benjamin guns, only a 1 year warranty on their compressors. Use a credit card which extends the warranty).