UV filter for the RX1?

I pulled the trigger tonight on the RX1.  A bit beyond my budget, but it's been a long time since I've seen pictures come out of a camera that make me feel like this one does.  The F717 (my first digital camera) and the R1 both gave me that same quickening of the pulse.

Anyway, I wanted to ask if anyone who's using the RX1 uses UV/or another protective filter on it?  I very much want to protect the lens, but not at the cost of IQ.  Is there a filter you recommend?  Or are you not using one at all?

I had a UV filter on one of my cameras once, and I took it off right away because it changed the output just enough to bother me.  Having said that, it wasn't a terribly expensive filter, so that may have been the problem.  Ever since then I've gone without filters and been very fortunate, but I don't want to take chances with the new camera if it's not necessary.

I realize a good filter isn't cheap, but it seems like a small price to pay in this case.  Any advice on brands and if/how they affect the IQ is much appreciated.

Thanks,

Carmen

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