The gamma correction is worthless to me because I render in Vue. As for the Lightwave  plugin, it might be  worth $200, at least until Vue 8 introduces improved indoor GI. Unfortunately, the 32 bit Fusion plugin limits the size of scenes you'd be able to render and high end programs generally don't like the heavy Poser polygon load. 

Download my free stuff here: http://www.renderosity.com/homepage.php?page=2&userid=323368