So after getting the Falcon last night I'm starting to think about how Lego has re-done 4 of the UCS sets now. Falcon, X-Wing, Snowspeeder, and Y-Wing.

I've currently got both versions of each, and am wondering if there's any real point in that.

Those of you collecting UCS, have you been buying the upgrades, and if so have you been keeping the older ones? Displaying them together? Keeping one boxed up?

Just looking for other people's insights into what they've been doing.