back on the topic of track wheels...
So there was a craigslist listing for wheels that I couldn't pass up.
$750 US for a set of 18" lightweight Enkei NT-03M Racing Wheels with Nitto NT-01 R-Comp rubber on them. The set was only used on two different track days so the wheels are perfect and the tires have one, maybe two more heavy track days left in them. My math says it's a pretty decent deal.
Here they are in front of "Ruby":
I've also attached a matrix I put together comparing the various tire options for these wheels to stock. (Columns shaded in red are what's currently mounted).