First off there is no such thing as the perfect Grouse gun. I have found the perfect gun is the one you don't own...yet. I have tried the following
Gunner's gun about as perfect as I'll ever get

VHE 28 28 inch bbls choked skt/skt straight grip DT
AAHE 28 (up grade) 26 inch IC/M and 28's M/F for the late season
DHE 20 26 inch straight stock IC/IC
VHE 20 26 inch straight stock SSt choked skt/skt
CHE 20 26 inch Damascus PG IC/M
CHE 20 28 inch IC/M straight stock
DH 16 O frame 26 inch Damascus IC/F
GH 16 O frame 28 inch Damascus IC/M
GHE 20 26 inch Damascus IC/M
H&H 20ga 26 inch IC/M
BUT IF I could order one from Parker it would be an AHE 28 straight stock, splinter, DT 28 inch bbls choked .004 and .010 on a OO frame. But after one season I'd be looking for something else...it's just the way thing are