Moving from Sony to Pentax

Has anyone here moved from Sony (preferably a700) to K5/30/5II?.

What have you found to be the pro/cons?  I particularly like the availability of a range of water resistant lenses as I shoot a lot from a rubber boat (the Sony option of a77 body is also WR but there is only one Sony WR lens at present).

I can see a number of downsides, but don't want to start a war, so will just see what your views are in the light of use.

I would prefer it if Maxeyesore did not respond as I am tired of reading his stuff on the Sony forum, however if he must I can just ignore it.

cheers

tom