Russian imperial advice

About to whip up a Russian Imperial and thought I'd get some feedback before I start the mash. Here's how its looking:

Jesus Christ Superbeer:
10 gallons
75 min boil

25 lb Idapils 2-row
3 lb Flaked Barley
1.5lb 120L Crystal
1.5lb Roasted Barley
1 lb Flaked Oats
1 lb 60L Crystal
1 lb Chocolate
.5lb Black Malt

60min mash at 155F

3oz Nugget 13.3AA 75min

London ale yeast (1.5L starter)

Projected: (at 85% efficiency)
OG - 1.092
FG - 1.023
ABV - 9.2%
SRM - 40
IBU - 55

Any suggestions welcome

Looks pretty good. IBUs seem on the low side to me though for this size/style. If you let this age (as you should), the bitterness will fade some. You might consider upping the hops a bit to get you into the 70-something IBUs.