I'm going to reiterate my recommendation to Mike about the FX Cyclone. Certainly, it's more expensive than an AA, but it's a damn sight cheaper than a Daystate :-). Anything the AA can do, the Cyclone can do, and maybe just a touch better. I've never heard a complaint about the Cyclone mags indexing properly, my Cyclone gets more shots on less air than my AA S400E, and I think the trigger is slightly better. Both my guns are .177's, the AA does 23 fpe with CPH's, the Cyclone does 21. The AA doesn't have adjustable power, I think my Cyclone on full power is slightly quieter, on the lower power levels it's definitely quieter. I wanted a multi shot field gun, the Cyclone fills the bill perfectly. Light, well balanced, good pointer, I can even shoot it off hand, and I suck shooting off hand :-)! Did I mention I really like my Cyclone?
For scopes, I have a Bushnell Legend 5-15x40, it's the only Legend that comes with a mil dot reticule. I'd been shooting with the scope at 10X, but when I moved inside for the winter, I dropped it to 5x, and I haven't changed it, even when taking the occasional longer shot at a starling or sparrow. Picked off a sparrow at about 45 yards and in the top of a tree on Sunday. If you prefer something more compact, I'd go with Peaks recommendation for the Burris Timberline. Good luck, and happy choosing!
Dave