Hi,
My friend owns the LC50. i have used it on a couple occasions and find it extremely fast in its operations. for example menus and refresh times are very good. And i find the images consistent with the other panasonic models with leica lens. If i were to reccomend, i would reccomend the FX1 or FX2. I'm not a big fan of high mp counts in small cameras (cos of the small CCD size) and you'll definitely appreciate the image stabilizer within.
Hope this helps!
Cheers,
Aus