Honestly I would brew something like the brewbama recipe. It seems like you have something else mind so I would just move forward.
13 lbs Pils
4 lbs Munich
3 lbs CaraMunich
1 lb Carafa II
The above is from the link provided by BrewBama.
The intent is to brew something our wife's will like. They drink Guinness. And they like it. We don't want to make a stout, but a dark lager. Rich, full bodied, with good malt forward character, balanced by hops. It is not really intended to be a BJCP profile beer.
Again, suggestions and/or comments are appreciated!