Lots of great info here, thanks guys!
Eghad: I need to go to the range because I live in a condo in a tightly packed housing development. Shooting inside will not be fun for long with a pellet trap, because the longest part of my place is probably only 7-8m. There is an "on-site nature preserve" backing up to my subdivision, but I think they may consider high power airguns as firearms. I wish I had a good place to shoot.
skans, 9-ball: Thanks for the clarification regarding break-barrels having as good accuracy as side or under-levers.
skans: I think I will pass on the Chinese gun. I know I may be missing out on a great deal, but I hate to send any more money over there than necessary. Even if I end up buying a Remington, Crosman, or Benjamin, that is made in China, at least I know America gets some money too.
Plus, if I get a problem gun from a Chinese company, I'm pretty much SOL.
I98ster: Thanks for the tip on the Remington. No, I have not decided whether I will go .177 or .22 yet. With .177, I'd be able to get cheap pellets locally, which would be nice. But they would be the junk pellets. I was kind of thinking about a hi-powered .22 that is about as powerful as it can be and still be subsonic. But then I read that the high-powered spring guns are less accurate as a direct result of their power. (more mass flying around inside the gun before the pellet leaves the barrel) I have mixed feelings about Remington right now. I just bought a Marlin 1894 which was not finished well since Remington took over. Left a sour taste in my mouth for them. On the other hand, I would have easy problem resolution if I had any problems with a Remington, right? $250 is sounding more and more reasonable, the more Dianas, Beemans, and Air Arms guns I look into. I guess one thing I'm curious about is why the big names in airguns don't use gas pistons if they're so great? Is it that they're more traditional and smaller companies, and therefore behind on newer technology? Or is there some weakness in the design that makes them avoid the technology?
mapsjanhere: RWS 48s are selling for $360 on Amazon now; and around $430 at the airgun-specific online retailers.
I think the next step for me is to look into our local airgun ordinances. If there is a velocity level after which they would consider it a firearm, and therefore illegal to shoot in city limits, I may make a decision based on that. I'm reading at straightshooters.com, where they have a lot of useful reviews, that lower and medium powered airguns are better for plinking and target shooting, and can be shot all day without the cocking effort becoming an issue. To them, medium-powered is still in the 800 fps range for .177, and would only require the one cocking stroke vs. 10 pumps needed on the Crosman 66 Powermaster I have now. (and that gun is only maybe a 600-700 fps gun with the very lightest pellets)
I'm also thinking of getting TWO guns. A Crosman American Classic pneumatic pistol for indoor and possibly local shooting, and then something in the big leauges like we're talking about here. Maybe not quite as big of a league as otherwise.