patinum

leather nor nav are big deals for me, but performance is. Si and RSX are probably very similar, but the LSD is what makes the Si stand out. However, you can probably pick up a used JDM Type-R LSD for around $500 (at least that's how much they were when I had my RSX). But that's another $500 on top of the $2K more for the RSX (give or take). My guess is that the Si is tuned (engine and suspension) more for sport and the RSX for sport/comfort (acura, although very sporty anyway). I say Si. Or get a TSX for more $$ (double wishbone )

*still hoping the new Si is a hint that a new Type-R is on it's way*