No clue on scopes. Someone said approximate rule for cost should be twice the cost of the rifle? What do you look for, certain companies?
Mid range scopes have really improved in the last 5-10 years. SWFA and Vortex are really good value. On the high end something from March, Kahles (Swarovski), US Optics, Nightforce. Gold standard is still the Schmidt & Bender PMII line for $3500 or so, though the gap between them and others has narrowed a lot.
Avoid hunting and BDC type reticles. Some variation of a mil dot reticle (mil = milliradian not military). I'd look for a first focal plane reticle and matching mil/mil reticle and turrets. So much more intuitive than second focal plane and mil reticle + MOA turret.
Any of these would be reasonable choices. (Links are just for general info, you can probably find better deals elsewhere.)
$1300 SWFA 5-25
$2200 Vortex Razor
$3050 Kahles 624i
$3600 S&B PMII
Also it's worth considering used. When it comes to high end scopes, it's pretty common for people to switch out to the latest and greatest. A lot of very lightly used scopes get sold to finance an upgrade, and the factory warranties usually transfer to the new owner.
I have one of the SWFA 5-25 atop an AR-10 and routinely shoot it out to 900 yards. When I miss it's not the scope's fault. But below that price point you're probably compromising more than that rifle deserves.
The difference between a good scope and a great scope is mostly apparent when lighting is marginal, early morning or dusk. There are a number of inexpensive scopes with nice glass these days, but their internals aren't always great, and if you're going to be shooting at range you need it to track correctly.
A .308 is going to have 400+ inches of drop at 1000 yards, so you'll need to dial in about 11 mils (40 or so MOA). Add a couple hundred bucks for good rings or a 1-piece mount ... will probably want 20 MOA of tilt built into the mount.
I prefer no safety on a combat weapon for that reason. My index finger is my safety.
I agree, a modern handgun in a good holster is safe, even with no safety and a round in the chamber. They don't fall out or accidentally go off. If you're going to Plaxico Burress your way through life, gun in sweatpant waistband style at the club, a manual safety would be prudent.