Simple question Apple Core: Looking to get an iPhone, do I wait for the 5S or go for the iPhone 5

Probably seems like a silly question, but I can get an 32GB iPhone 5 for $150 (friend is selling it to me for my Nexus 4). Seems like a good deal, seeing how an unlocked iPhone 5 is going for $600 and up on eBay.

Apple's S line is pretty good, but it never exactly blew me away. However, I have a feeling the upcoming iPhone 5S is going to be a bigger deal. The HTC One and Nexus 4 (and I guess the GS4...though it's not really my taste) are beautiful/powerful phones and I think Apple is going to do a hell of a lot more than putting a better processor in an iPhone 5 shell to compete.

What do you think? Is the iPhone 5S going to be yet another incremental upgrade or are we going to see a show stopper? I know we have very little to go on right now, except for the duel flash and finger scanner rumor, so I guess it's hard to say.

If you were in my shoes, would you just get the iPhone 5 or wait a few months for the 5S?