Need advice on rubber selection - Defensive/attack

Base on my playing style, I always apply chop technique for defensive tactic and I realise that my backhand rubber is an offensize rubber which is slightly slower then my offensive forehand. The problem is, my backhand topspin is also one of my killer moves which I am afraid might get effected when I change to a totally deffensive rubber. Another reason for me to change my rubber to a "super chop" rubber is because I belief that it will improve my serves with the added advantage of its xtra spin. Is there any rubber that you can advice base on my playing style that I have describe.

 Thank you.

Hi Malek,

I will throw this one open to our vast website users knowledge.  Does anyone have some advice for Malek?