Very nice mate. My opinion on the TRD lip is the same, always thought it looked quite bulky and clumsy, but done this way looks superb! Like a proper diffuser! Lol! I would leave it without the skirts, just my opinion though, think it looks smoother, cleaner.
And it doesn't look bad with the 17's mate, depends what look you're after.
I would like the rear TRD lip on mine done this way, but i doubt it'd have the same effect on a black car ! LOL!