I have a good recipe for old Märzen which uses Saaz hops, but I think my IBU is a tad low (8-ish). I was thinking of maybe trying Hallertauer or Tettnanger this Christmas.
Aye, got that part down pat. I can hit 20 with larger amounts of Saaz, but it's a tad too hoppy and decreasing it makes it a tad too malty...I can't seem to get the perfect balance which is why I was looking for others' opinions.
Sterling is an American, higher-alpha version of Saaz with the possibility for some Cascade-like citrus, but I use it a lot and only get that when I use it in higher quantities. You could use it as a FWH on its own for a Marzen.