I'm not a fan of the Fibersteel shifter. It is not that precise(uses a VW Beetle shifter) and also requires raising the passenger seat. They are also VERY pricey for what they are.
I'd keep the cable shifter. If you can fit the e-brake fine, if not learn to live with it?
My OE-style e-brake is on the passenger side of my PBS cable shifter. It just fits.