I'm just getting into long range shooting and picked up a Rem700 SPS in .308. Right now ive got a cheapo Tasco 3-9x40, its not enough for what i want to do, im looking for a scope to coyote and deer hunt, plus shoot up to 600-1000 yards whats a good recommendation for a great scope, im looking at a Vortex Viper. I'm not looking to spend over 500 dollars, any reccomendations would be greatly appreciated...Thanks