I can tell the difference from pilsner and pale 2-row malt when I'm mashing, so I'm sure the finished product would be different. I've never made a lager with pale 2-row so I'm not sure how it would turn out, especially if it's a huge part of the recipe. A 10lb bag of Pilsner is like 15 bucks, so I would just just buy that.
Here's a doppelbock recipe from Clone Brews that I've made and I really like it.
HOME BREW RECIPE:
Title: Celebrator Doppelbock
Brew Method: All Grain
Style Name: Doppelbock
Boil Time: 60 min
Batch Size: 5.5 gallons (fermentor volume)
Boil Size: 7.0 gallons
Efficiency: 75% (brew house)
STATS:
Original Gravity: 1.082
Final Gravity: 1.023
ABV (standard): 7.75%
IBU (tinseth): 25.89
SRM (morey): 20.68
FERMENTABLES:
10.5 lb - German - Pilsner (65.4%)
4 lb - German - Munich Dark (24.9%)
12 oz - German - Dark Munich (4.7%)
8 oz - United Kingdom - Crystal 70L (3.1%)
5 oz - United Kingdom - Chocolate (1.9%)
HOPS:
0.75 oz - Northern Brewer for 60 min, Type: Pellet, Use: Boil (AA 7.8)
0.5 oz - Domestic Hallertau for 60 min, Type: Pellet, Use: Boil (AA 3.75)
0.25 oz - Domestic Hallertau for 15 min, Type: Pellet, Use: Boil (AA 3.9)
MASH STEPS:
1) Infusion, Temp: 153 F, Time: 90 min
2) Sparge, Temp: 168 F
OTHER INGREDIENTS:
8 oz - Maltodextrine, Time: 60 min, Type: Fining, Use: Boil
1 tsp - Irish Moss, Time: 15 min, Type: Fining, Use: Boil
YEAST:
Wyeast - Munich Lager 2308
Starter: Yes
Form: Liquid
Attenuation (avg): 72%
Flocculation: Medium
Optimum Temperature: 48 F - 56 F
NOTES:
Original recipe calls for 1.082 OG, 44-46 SRM 24 IBU.