The only part that could get you re-thinking the rear callipers is if they are too visible through the 15 inch wheels... they could end up looking like crap before the Wilwoods up in the front
... or maybe not.
I feel like I'm under your car right now... just last fortnight I had 2 litres of 3m Under Shield sprayed, the original under coat had thinned down over the years. Your undercoat with the tien coilovers is a photocopy of how my car looks underneath... our coilovers are identical
Only your setting is way way lower coz I need much more clearance around here to enjoy a long drive and avoid blowing apart the under plastics on those Speed Breakers - Car Breakers actually
You're doing this with great care, take your time Josh... awesome stuff!