Man did you open a can of worms. A lot of brand name arguments could come up here. Not to mention Caliber
What are you shooting at and what kind of Long Range?
Savage and Weatherby, (Howa 1500 lightnings are the same as Weatherby Vanguards)make good entry level bolt actions that shoot well out of the box. Remington makes a number of them too, I just don't like remingtons, the 700 series of rifles are worth looking at, again I just don't like them. $350.00 - $499.00 depending on caliber and features.
Stick with common calibers for easy prices on ammo, 223/5.56 , .243 , .308/7.62x51 for nothing bigger than a White tail deer. 30.06, 7mm, 300 winmag, if you are shooting larger game. You will need to reload to get 300 winmag or 7mm inexpensive enough to shoot frequently.
You may also want to look into Military Surplus rifles, I like my Ishapore .308's, $179.00 range.
Mausers $99.00 - $180 are generaly inexpensive and shoot well but getting a good flat shooter with any Mil-Surp may take buying two or three thus making it simpler to buy a NIB Sporting rifle.
Good Sources for Military surplus:
Samco Global Arms
http://www.samcoglobal.com/ (6.5 Swede's are fine shooters)
AIM Surplus
http://www.aimsurplus.com/
J&G Sales
http://www.jgsales.com/
H&R NEF makes a dandy single shot break action rifle in the $250.00 range
They are available most calibers and in all that are considered flat shooters. I own one in .243 with a heavy barrel and I love it.
I don't know the price range of other single shot rifles but they make for an interesting challenge when you only get one shot.
Keep in mind none of this is Gospel and or divinely inspired, it is not written in Stone either. Mostly General concensus and generalizations since you did not say what you would be doing with said rifle.