The advantage of the SC430 swap as I see it is that the spec'd Xenon lamp, projector and lens were designed to work together to provide good coverage, focus, edge sharpness, etc. The TSX-R lens swap uses shims between lens and existing LX470 projector to improve the focus and coverage. And, with the TSX solution you're dealing with a stock LX projector that wasn't designed to take a Xenon bulb...you can make it work, but it was designed for 55w halogen.
While I like the SC430 swap, it's a lotta dough when you see the prices the units get on ebay. And, it still requires getting the headlight on your LX apart by using heat to soften the adhesive.