I have a little so say about strut bars. This is almost purely speculative, but I think a rear strut bar will aid in setting the car up with a little extra oversteer. I have read that getting a stiffer anti sway bar back there will give it a tick of oversteer as well as relatively stiffer springs i.e. a 400lb front/325 rear setup will oversteer a bit more than a 400front/300 rear will. I would assume the strut bar would be the same thing. When that time comes for me, I would (and will) get a rear bar for sure. Heres a good read for ya....
http://www.automotiveforums.com/vbul...d.php?t=634403
I kinda wish gsxhooptie was still around, as I remember I like reading his posts....