Sway Bar Help!

I've run into the problem of the stock sway bar hitting my oil pan on my rb25. I've tried making ever sort of spacer, but nothing works good. I looked into the sikky front sway bar, but its 32mm thick. And I know if I have that big of a front bar, and my stock rear bar, it will understeer dramatically. So I was thinking of going with a 28mm rear bar, to even things out. But from what I read, too thick of sway bars can really mess up the suspension geometry. Right now I just have tein lowering springs. Anyone have any advise, or think this sway bar setup would be good/bad? If so, anyone have any other solutions? Thanks in advance.