the self contained PT headlamps seem to hold up better than the ones with the back mounted battery packs.. Been using an eos for years too, mostly use it now for running at night..
If you want to save some $$$, I have bought a bunch of these are they are right on spec with the eos at 1/6 the price..
http://cgi.ebay.com/1W-LED-NEW-HEADL...item3a5614626f