Wow I'm shocked at the different look of concave between OE and replica. My 168s are replicas but factory offsets and the rears on mine look like your OE 87 rears (et30 is pretty concave). But the looks is pretty damn good Matt!
In order to give some input, you currently have:
-1 OE set of staggered 87s
-1 replica set of staggered 87s
-1 OE chrome plate set of staggered 87s
Is that right? Oh yeah and btw after the front flares are on, no spacers are needed. H&R springs with the rear links would look good though
If it were me, I don't know how easy it is to strip chrome plating, but I'd refinish 4 square 10.5" 87 rears if you want to run 315s and 10.5's all around, so they match cosmetically as well as quality wise.
Take the OE fronts, and use them as a winter set in 9.5s as you'll get better snow traction with 275/40's.
Sell the replica set you could prob get some decent coin for it.
My 2 pennies...