My set up is pretty much what your talking about, full poly bushes, whiteline bars, delta v rio plates and coilovers. I like it, great response, good feedback, fantastic feel, but the main point with the bars for me was to gain the adjustability.
It sounds like you are close to making up your mind anyway, and I would guess if you didn't do this now you'll continue to think about it for a while and then do it anyway lol.