Thanks mattbird,
I really tried to put together a nice run of Batman's, Sensation's, Superman's, etc. a few years ago, but became quickly frustrated when I was beaten out on about 90% of the auctions. Good Girl Art in general is a much easier task to put a nice run together than let's say Action war covers, due to less competition (especially outside Ebay).
I've still kept these suprehero GA comics (as well as my key SA and BA books), since I like having a diversified collection. I actually try and keep the number of slabbed books from each title below 10. I guess I'm more of an anti-completist if anything.