I would give the Ati Nova Vista LIBERTY a hard look before i take that Aspen. at $300 you get alot for your money. it is regulated 40-50 shots and can fill to 4300psi. Alot more powerful than the aspen with little work. not to mention very light weight, adjustable trigger, removable pressure chamber. you will pump to 3600psi (best starting pressure) shoot down to 2600psi then fill it back up with hand pump, Carbon bottle, or compressor. the only plus side to the Aspen is that its self efficient with built in pump. Umarex gauntlet can reach 100 yards with accuracy too. Hatsan flash, gamo urban are some of the best guns under $300. I am sure there are others
Check the thread: Any Us Importers Carrying this gun? Lots of info there.
LOVE my Liberty. I bought a second one and I will making two more walnut stocks in the next few months. Sporter style and Bantam Sniper style. Here is my 100 yard 5 shot group in 10 MPH wind.