You are absolutely on the right track.
Start off with some stuffed mushroom caps - try a seafood mix with some bread crumbs and butter, perhaps some chives (food processor, spread in caps, broil, paprika garnish)
Asparagus with butter is great, very light - I'd offer fresh cut lemon wedges, also. If you do decide to sauce the asparagus, remember to stay away from anything that has the same cream consistancy as the alfredo.
Light white - with an alfredo, you can get away with a nice Riesling, very cold - I am not a fan of sparkling wines with an entree, though you can feel free to start a bottle with the mushrooms.
If you have the time, twice baked potatoes might be nice - bake, scoop out, make a nice whipped potato with a bit of cheddar and garlic (easy there - a bit of garlic) and maybe a little parsley for color, scoop back in, top with a little cheddar, broil to melt tops.
This dinner is going to rock.
FYI, I'd be thinking sherbet and those long wafer tube cookies (can't think what they're called...come in a can?) for dessert.
Good luck! - Stuart