There are a lot of options with air rifles, and some are very quiet. If your neighbors are cool, you can plink to your heart's desire in the back yard. "1,000 fps" with an air rifle isn't like the same velocity with a bullet. The hollow skirt of a pellet is like a shuttlecock, stabilizing it in flight but also slowing it down very quickly. Like down to 600 fps or maybe even less at 50 yards.
My personal shooter is a .25 cal breakbarrel. It pushes a 25.4 grain jsb exact about 700 feet per second. On armadillos, one shot through the pumphouse is a kill. Also not very loud. The slap of the pellet is worse than the report.
Visit
www.gatewaytoairguns.org if you really want an airgun education. Refer your buddy there as well. Great group of guys, all very airgun savvy. It will open your eyes to a whole new world of shooting.