where should I start looking.. (hard to start)

[vegas80step]

Hey guys, I think my ignition switch is going.. but thought I'd run it by you guys and see if there is other areas I should look into..

When I turn my key all the way it wont start, sound and feels like my battery is dead. (no crank) If I let off the key a bit it fires right up.

I didn't have this problem when I dropped my truck off for paint (last october)

I'm switching to a push button start next week, I wanted to make sure it was the Ignition before I did. I don't want to have it not work right and not know if it was the new button start or something else..

any ideas?