I finally had my rear shocks replaced.
The OEM shocks which were removed are actually gas unit shocks.
Looks like monotubes.. not sure. The manufacturer is KYB.
Sadly, there were no nice aftermarket shock/strut options available from either Koni or Bilstein.
I saw the Megan Racing coilover kit but I didn't want to spend all that money and have the vehicle lower than what it is now just with stock 16in wheels. If I had stock 17in, yeah maybe...
I went with a pair of KYB Excel-G shocks which are OEM replacements.
The local shop sold them to me for $50 a piece. Yeah, I can get em cheaper on the Internet but didn't want to wait around.
Local shop install was $140 for 2 rear corners, and $60 for alignment. All up, $300 drive away, for both the rear shocks replaced.
Hope this helps others searching around here in the future...
Keywords: coilovers, shocks struts, suspension replacement