The best beer to use is the cheap "Horse Piss" stuff that isn't worth drinking in the first place. In addition to the beer, I'd throw in a few cloves of crushed garlic, red wine vinegar, tomato sauce, and a little chili powder for an extra kick. I'd also cook some of it down for sauce.I marinaded some flank steak in beer a couple weeks ago. It was beer I still had after I quit drinking. Quilter's Irish Death is a very smooth dark ale but it overpowered the flavor of the meat. Not that it wasn't tasty... and it came out TENDER!!! If I were to marinade with beer again, I'd use a lighter brew.