I did not see it mentioned here, but Academy has remington 700 ADL's in 243, .270, 7 MM Mag, 7MM-08, 25-06, 30-06. Your choice for $349.99. Plus, you could get a nikon pro-staff 3-9x40 for 169.99 or a leupold rifleman 3-9x40 for 199.99. Still need to get the mounts and rings, which should cost you around $50.00 for both. After sales tax, you will prob be just above your budget ($620 app). I would go with either the .243, .270, or 30-06 and prob not the .243 if I was going for anything larger than deer. These are the most prevalent calibers and as such, seem to have the easiest ammo to find.
One loves to possess arms, though they hope never to have occasion for them. -Thomas Jefferson