One thing I noticed with the DA35 is that if you put a filter on it, then the lens cap won't screw back on properly. Since I like to keep a UV filter on my lenses at all times, I just use a generic 49mm cap and the original lens cap stays at home. If I lose the generic cap, then no big deal.
I'll probably do the same thing with any more limited lenses that I get. Besides not having to worry about replacing an expensive lens cap, screwing the lens cap on and off when I'm out and about is a pain, so the clip-on is a lot easier to deal with in that respect, as well.
Heather