That other thread is here:

http://www.peachparts.com/shopforum/showthread.php?t=130780

Things like glasses that you use so much and that perform such a critical function are worth the extra money. If you think about spreading the cost over the lifespan of the glasses it is not so much really.

Also, in some of the pivotal moments in your life someone will look you in the eye. What do you want them to see? You probably don't want them to wonder if you are trying to dress like Elton John.