Base Malt + recipe critic

I'm going to be buying grain Saturday as I'm out.  I generally like to get a 50lb sack of Domestic 2-row as it seems useful in a lot of styles, but the more I brew the more I realize it's not.  Is there a better base malt that would be better rounded to suite more styles?  I don't think I brew enough to get 50lbs of 2-row, MO, and a pils.

I'm thinking of going 50lbs of 2-row and then some 10lb bags of MO, BoPils, Golden Promise, and Belgian Pils (German Pils?).  I like to be able to make a wide range of styles without having to plan way ahead for a brew day or have to go buy grain the day of.

BTW this is to compliment my 6lbs of hops that just arrived:  Saaz, Willamette, Cascade, Styrian's, Magnum, Hallertau.  Oh and if anyone needs a few oz and can afford to wait a bit to get them... hit me up.

Also here's a recipe I came up with for a Düsseldorf Alt.  Please critic and tell me it's shit.
5lbs German/BoPils
3lbs German Munich
.5lb CaraMunich
.5lb Crystal 40
1.6oz Chocolate malt
For around a 1.050 beer
I was thinking doing .75oz of Magnum for the bittering and the Hallertau for like a 15 and 5 addition for ~40ibus.  But I could go all Hallertau.
wyeast 1007 or wlp036
Single Decoction Mash with a protein rest and sacc rest at 154.  I was thinking along the lines of a 30min decoction and maybe I could forgo the chocolate malt for color?

Who are you?

As for malt, I think American 2-row is really only good for American ales, and even then I like to add either a lot of character malt (crystal, biscuit, aromatic, Munich, Vienna) and/or a fair amount of a British malt.

A good German Pils is fairly flexible is you brew a lot of pale lagers or lighter-colored ales-- blonde, witbier, triple, APA, light biere de garde and saison, etc.

For good representations of British styles I consider British malts irreplaceable.

So yeah, IMO if you want to brew stylistically accurate beer you have to have different base malts around. (We're 4-5 months away from our usual annual group grain purchase.)

(I don't brew Altbier.  )

Zach