Greg...I was in the same situation you are at last June only I had to get a new crank. I am glad I went the 4mil route but also remember all the little extra things you need along with the crank like...
seals, pancake bearing upgrade?, Impeller upgrade?, clutch upgrade?, basket upgrade?, case porting? ect...
These were the "little" things that added up that I wasn't expecting...my thought was, since it was apart might as well make sure every little thing was good to go!
Not trying to sway you not to do it...but if your on a budget, keep these in mind!