The 33 - 55 is a perfectly good lens in my opinion. Not as good as the DA 28 - 45, but a good lens nonetheless. If you can get a good copy for the right money, pull the trigger on that also.
---------- Post added 11-13-15 at 08:52 PM ----------
Originally posted by mattb123 Thanks for all the encouragement! I try not to get too attached to or excited for objects but that's all out the window now!
Are there any really awful 645 lenses I should avoid? At least that I don't already have?
Apparently the 45 you have isn't great. I have the FA45 and it's fine though not stellar...