Looking to upgrade. Hope yall can help :)

Patience is a virtue!
I think my rifle meets almost of your criteria except for 1, price. I have Daystate Huntsman XL. I get about 85-90 shots on a full tank, it weighs 6.5 lbs and it has a about 28- 30 ft-lbs. It is pretty quiet and is very very accurate. I have taken several pest birds at 75 yds. 
I started this post by saying, patience is a virtue because I looked for about 1 year but I found my gun as used or pre-owned for $900.00 in excellent shape. New they are $1,295.00.

Good luck in your search!
Rchr
 
I have the Gen 2 Marauder in .22. 100 yards is a very long shot for the gun. I get 30 to 40 shots per fill, not the 50 you wish. I do like the synthetic stock,

The .25 will typically give fewer shots per fill, but the heavier pellet bucks the wind much better than a .22.

The total kit ran about $1200 and included:

Marauder Gen 2 $500
Scope (BSA 4-14 FFP) $250
hand pump $200
4500 lb carbon fiber bottle and valve $300

Extra magazines $30
Pellets about $10 per 500

You can get a kit with a Center Point scope, and they are very acceptable
Air bottles can be filled at Paintball shops. If you get the bottle, skip the pump.

The $1000 limit really does limit you to something in the Marauder range. It's a good gun, just make sure you get a Gen 2 version.

Crickets get very good reviews as do any FX, Daystate or Air Arms..