i think your numbers are perfectly reasonable. one thing i'd like to stress again is that cylinder layout has little to do with power production. it's all about airflow management in the cylinder head(s), intake, and exhaust.
-Mike
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1991 MR2 Turbo - 2.1L high compression stroker 3SGTE
2006 Tacoma 4x4 TRD Off Road - All-Pro front bumper, Old Man Emu shocks, Old Man Emu HD front coils, All-Pro leafs
1990 240SX Coupe - sold
2008 Civic Si Sedan