Imperial Stout Recipe

Hi all, brewing a MB size recipe as a test - I put the 5 gallon amounts in parenthesis for the MB challenged. Appreciate any feedback. I'm still learning hops - are Goldings and Perle close at all? Would replacing one for the other effect much? Hoping for some coffee/chocolate flavors. Thanks!

Brewer: MysteryRed
Style: Imperial Stout
Batch: 2.13 galExtract

Characteristics
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Recipe Gravity: 1.093 OG
Recipe Bitterness: 53 IBU
Recipe Color: 50° SRM
Estimated FG: 1.023
Alcohol by Volume: 9.0%
Alcohol by Weight: 7.1%

Ingredients
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Black Patent (US) 0.10 lb, Grain, Steeped (.24)
Briess DME - Pilsen Light 4.00 lb, Extract, Extract (9.4)
CaraMunich 0.25 lb, Grain, Steeped (.59)
Chocolate Malt (US) 0.40 lb, Grain, Steeped (.94)
Roasted Barley 0.50 lb, Grain, Steeped (1.18)


Fuggles (U.K.) 0.25 oz, Pellet, 60 minutes (.59)
Goldings (U.S.) 0.80 oz, Pellet, 60 minutes (1.88)
Fuggles (U.K.) 0.25 oz, Pellet, 20 minutes (.59)
Perle 0.65 oz, Pellet, 20 minutes (1.53)

European Ale yeast 1.00 unit, Yeast,

Notes
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Recipe Notes:
Yeast - Nottingham or s-04

somewhat alike. goldings is spicy and aromatic, but mild. perle is a good, spicy, bittering hops. switch the perle and the goldings, is my advice. perle is for bittering, goldings is for aroma