I agree with those Czech Dark recipes - spot on with what I do.
As to a Vienna for 5 gallons here's one from a friend who wins a lot in comps with it:
5.5# Weyermann Vienna
2 lbs Best Red X
1.6# Weyermann Pils
2 ozs. Carafa II Special (or Midnight Wheat)
.5 oz Mittelfruh, .25 oz. Magnum, and .25 oz. Tettnang at 60 minutes (or FWH)
.5 oz Tettnang at 10 minutes (or KO)
Water adjustments from RO - Mash .75g CaSO4, .25g CaCl2, .92ml Lactic Acid; Boil - 1g CaSO4, .35g CaCl2, 1.6ml Lactic Acid
Wyeast 2206 or brewer's preferred lager yeast strain of choice. Batch sparged, naturally....(though I have done a Hochkurz step mash also with good results).
Cheers!