On the cheap, I'd go with Old Milwaukee. A brown box of 24 longnecks is $9.99 if you can find 'em in your neck of the woods. I used to go through a box a week for about a year back in college.
Barring that, I'd go for some PBR (the local favorite, but not mine).
If you're willing to spend a bit more, I love Labbatt Blue.
A little more, and you can get a locally distributed beer like Bell's, Deschutes, etc....
BTW, why "settle" on one beer?
Just saw you are from Salem. I recommend (in no particular order): Deschutes Obsidian Stout, Deschutes Jubelale, Pelican IPA, Amnesia IPA (just had it for the first time tonight. My new favorite beer!), Lagunitas Brown Shugga' (it's very sweet, but is %10), and Flat Tire.