I preordered the X20, and I'm hoping that it will be the "ultimate" serious compact camera ever. The two improvements over the X10 that I'm looking forward to the most is the optical viewfinder and new AF system. In my X10, I rarely used the OVF, because there was no information about shutter speed, f-stop, and focus confirmation. It is a nice OVF compared to other compact cameras, but the lack of information made it less useful. Fuji listened to its customer base and changed that by pushing the technology boundary for compact cameras. The addition of phase detect to the AF system should hopefully bring Fuji up to par with other AF systems. The X10's AF was actually not too shabby relative to the X100, XPro1 and XE1 (when not using the 18-55). But the phase detect will hopefully help primarily in low light situations and CAF, which has been an inherent weakness in contrast detect AF systems. Can't wait to try out the X20! And I'm sure I'll say the same thing about the X30!