I used to work for Sony so my first experience with DSLRs was with theirs- I was keen on an Alpha 200, 300 and lusted after the A700 which was out of my price range. Then they brought out their next range of smaller cameras which I just hated feel wise, the grip was horrible.
Sony then released the A500/550 and it was a contest between the 7 FPS and swivel screen of the A550 or the Pentaprism/Mangnesium WR body of the A700.
I was close to buying them till I saw a review of a K7 vs an A700 by a Sony user and it was better in everyway. Add to that the cost of lenses and the Pentax won the battle
After that I felt a K7 instore and it just fitted like a glove!
Its great as some of the pentax features I didn't really rate I actually use alot (live view, auto horizon correction/electronic level/TAv mode, green button) .
One thing I really miss from the Sonys are their excellent swivel screens and live view AF which would really put the icing on the cake.
Hopefully next camera