Whalers makes some pretty good flavored rum. I particularly like the "Vanille". Not cloyingly sweet like other flavored schnapps/cordials.

For Whiskey I like "Wild Turkey 80" as a staple. A pretty good Bourbon for well under $20. The 101 is a bit harsh IMO. If you want real cheap stuff that's palatable, "old Crow" tastes just like "Jim Beam" at a cheaper price.

As mentioned before, "Keystone Light" is a good replacement for "Coors light".

For a good strong Belgian Ale, you can't beat "Ommegang Abbey Ale" for price. They have some other styles that are good too.

I have not found a good cheap scotch yet. Any Scotch worth drinking is pricey.