HD Manuals all the way. They're not really that expensive when thinking about how much they have saved me in time and mechanic costs. Get the service manual AND the electrical diagnostic manual. With both, there's not much you can't do on your own.
The last time I looked at one, the Chilton's manual doesn't give specifics about the bike you want to repair. The HD manual has illustrations in it that are rather lacking at some times as to orientation of the part you are working on or what you looking at in general. At least they aren't photo copies that have turned into smudges like some books present.
The fix for the service manual illustrations shortcomings is the Touring Models Parts Catalog for your specific model year. The parts schematics are awesome. The parts manual is #99456-XX with XX=model year.