Need A Great Special Bitter

Help me out guys. I've been searching for a killer special bitter receipe and there are a ton. What do you guys make/recommend?
Thanks

Special bitter is a great style, I brew it more often than I care to mention. This is my latest version (a 4 gal. test batch for homemade invert syrup) and it turned out really fantastic; going to be re-brewing it this weekend with no 2 invert at ESB strength.

81.5% - 5.5 lbs. Pale Malt, Maris Otter - TF
7.4% - 0.5 lbs. Crystal Malt, 40L
11.0% - 0.75 lbs. No.1 Invert Syrup

1.50 oz. EKG @ 60 min for 30 IBU
0.50 oz. EKG @ 10 min for 5 IBU
1.00 oz. EKG @ flameout

Yeast: Wyeast Labs 1968, Fullers ESB
O.G: 1.048, F.G: 1.008, 35 IBU

What do you think of using cacasde in place of goldings? does that keep it from being a bitters? Keep it traditional or what?