8pointduck,
I've got the A-Bolt in .300 Win Mag and I really like the gun. I get that feeling rather often. I have now reached critical mass, I no longer have room in the gun safes and the missus would notice if I bought a new one. I hate the idea of getting rid of a gun to make room for a new one but that may be what I'm down to.
1300pump,
I would go with the 9mm due to really cheap ammo. .40 cal is at least 50% more expensive and often more. I have a Marlin Camp Rifle in 9mm and it is a very effective coyote gun out to nearly 100 yards with 147 gr bullets. I use it in built up areas where the report of a shotgun or heavier rifle would not sit well with the neighbors.
Marland,
If you're shooting from the combine, I would go with a semi-auto. A flat top AR-15 would be my choice, the M4 configuration would be preferred. Mine currently has a 2x7 Burris Compact from another rifle but that is only temporary until I decide what I want. The .223 round will reach out a good 200 to 250 yards with the right bullet and that is generally good enough for me. If you are set on a bolt, I really like the Savage and Remington as they seem to have better triggers than the Brownings on average though I like the appearance of the Browning the best. A 22/250 is all the more one needs for coyotes, it will reach out and touch them about as far as one can see. I used a 98 Mauser rechambered to 6mm Remington for years and it doesn't do anything any better than my buddies' 22/250s. The ammo for these are also fairly inexpensive and easily found compared to the 220 Swift and 223 WSSM and has less recoil and noise than the 243. For a scope I would go with the best I could afford, I like Leupold, Burris, and the Simmons Aetec but I think most companies produce at least some good lines.