Beefeater is a gin, but it's definitely not nationwide. If you haven't seen it yet chances are it's not in your area.
It really depends on what you're booze shopping FOR... I'm going to assume it's a moderately sized party (20ish people) given your choice to go with a lot of 30 racks instead of a keg. Fuck Bud Light and PBR either way, Miller Lite is the ideal drinking game beer. Smooth and light enough for chugging but it actually tastes decent for what it is. Next, a few 12 packs of good microbrews for you and your boys... and whatever girls you're trying to poke. Lastly, lots of cheap gin and vodka for a gin bucket. You don't need mixed drinks, just a gin bucket. It will fuck people up, and it tastes delicious. Look it up if you don't know how to make one because believe me - they're bomb shit.
If you're going to have much more than 25 people though, get a fucking keg. Such a better deal, and they're a lot more party/cleaning/everything-friendly than a lot of cans.