Regarding the constant flashing, the only time my K-50 ever does that is when I forget that I left the cap on, so I don't know if that's a bigger problem with your camera, or what. I don't play much with the flash, but I remember reading the 1/180th sync speed in the specs before I bought it, so I at least knew. Hasn't been an issue for what I use the camera for. I personally have no issues with the thin lines on the focusing screen, but maybe an aftermarket one will be better for you. I actually purchased the matte screen with no lines on it, but I usually crop/compose my shots (I shoot a lot of macro flowers. and only want parts of the flower).
I'm sure some other folks will chime in about your feelings on the flash/sync speed. Lots of opinions around here.
EDIT: LOL -- I was the first responder, but look at all of the responses you got while I was typing. Also, considering your take on advertising, when was the last time you saw a TV spot for Pentax?! I've went through entire camera magazines seeing only the 645z referenced. I think the opinion, at least in this forum, is that the main reason Pentax doesn't have bigger market share, more new goodies, etc. -- is because they have an invisible presence outside of Asia.
Last edited by esrandall; 10-08-2014 at 06:42 AM.