Is it worth it to trade in my Sony a7ii and Zeiss 50mm f/1.8 lens for a Pentax KP with a couple primes and a zoom? I like the weather sealing of Pentax bodies and any lenses I get for it will also work on my K10D. I can't think of anything about the a7ii that makes me want to keep it except for the fact I already have it. Thoughts?