http://www.ebay.com/itm/Flex-LK302V...ol-Used-Works-Great-GERMANY-WOW-/291623980376
While I don't have or have used the one you mentioned I do have extensive experience with the one in the link. My vote would be flex hands down. If I had to get another one I would look for a good used one like the one I have because they are really that good and bullet proof. In the meantime I would also have mine repaired or get the parts and do it myself so I would have a back-up, no way would I get rid of it, I like it that much.
As for weight, it has a nice balance and I really like the feel but then again I have been using flex's for a tick over 25yrs and just can't see myself having anything else unless someone copy's it (Porter Cable did for awhile). So I guess I'm biased.
Shine has said his housing gets warm but I think he has a newer/different model then mine. Mine does not get overly warm at all it just works and doesn't stop.
I want one of their orbital buffers for absolute final polish and will get one when the next job calls for it, I can see that working real nice and save the elbows and wrists from excessive hand rubbing.
If you would like I would be happy to send you mine to try, I won't be needing it for a while. That way you can get an idea of what you can expect.
The only small quirk with the design is the speed dial has one spot that ramps up. I have used 2 others (same exact unit) and they do it also. It is no big deal to me and no one else has said any different when they have used it.
In the entire time I have been using them only one needed brushes because of the crap that gets in the vents no one would clean.
The offer is there if you would like to try it let me know.