I have to agree with moxford's advice above. #1 really is more important than I ever realized before actually handling different bodies. #2 is valid but perhaps not the biggest deciding factor. #3&4 are spot on as you can get some outstanding bodies used for great deals and while bodies will constantly be upgrading and changing, good glass will last a very long time.
Here are a couple fun videos reinforcing why I went with Pentax:
https://www.youtube.com/watch?v=bIfFR1AvlKY
https://www.youtube.com/watch?v=Eo61t5fH6Qw
Here are a couple fun videos reinforcing why I went with Pentax:
https://www.youtube.com/watch?v=bIfFR1AvlKY
https://www.youtube.com/watch?v=Eo61t5fH6Qw