There are many low end blow backs built much like the Spyders... Black Draguns, Rebels. If you are set on a mechanical marker the Shutter is (IMO) the best of the lot. For not much more you can step up to the electro line, Imagine, E-99, Esprit (Imagine without foregrip and bottom line). Kingman has a new marker out (Electra) that costs a bit more, but doesn't look to be any real improvement over the E-99 or Imagine (they added a Digital readout ROF counter... whoopee). All of these markers will go full auto... you might want to be careful about that.
In my opinion (yup, I have one of those too) the Flash and higher end blow-back spyders are no performance improvement over the bottom electros. Same basic internals, just add ano, LCD's etc.