K-Member / Rack & Pinion Steering Suggestions

Hi All ... Looking at the next element of my '68 Bcuda Convertible build plans. We are goign to replace the front-end with a contemporary system. Not married to anything specific and have only looked a little a QA1. Will likely be donning the car with slightly larger wheels and lowering the car's stance 1-2". Would appreciate people's input (i.e. suggestions/avoids/benefits/cons) concerning what you know and have experienced ... thx as always !