so u have swifts already installed? they will settle a little bit after driving around. easiest solution for u would be to get rear spacers to match the aggressiveness of the front after u drive it around a few hundred miles.
some folks like da poked look, u might get use to it too..
ET32 for front is if ur ride is stock. the shorter sidewalls on ur 20's pronounce the wheel gap too..
ive found budget wheels's offsets are pretty inaccurate.. ur wheel might say ET20, it could be as low as ET10-12..
especially if ure saying the rear looks perfect lowered at ET27..
ET27 would be very conservative for a lowered ride with 10.5".