I could go with option 4. But the down tube shifters are my biggest concern. Having never ridin in a crit, are shifters on the down tube going to hinder me all that much or do you not really shift all that much to even matter?
Get a right side bar end shifter:
http://sprinterdellacasa.blogspot.co...for-crits.html
From a post
here.
Get a proper fit stem, clipless pedals, well tensioned wheels (original wheels probably won't be well tension-able), and fresh rubber.
You should be fine like that.