I'll second wolleys comments. With those 4 manuals, you'll have a good variety to cross reference with.
I've got a few of the Loadbooks, but as others have said...the data can get kinda old. they don't seem to keep up to date when the manufacturers release a new manual. My .25-06 Loadbook (bought about 3 years ago) still has the data from the Hornady 3rd edition manual, which is late-80s printing.
I'd also keep a look out for a newer Hornady manual whenever your favorite shopping outfit has em on sale.
The 4th Edition is circa 1991 and even thought it's still on my bench because I've got oodles of notes penciled into it I always cross reference to the current 7th Ed manual. I would say that 80% of the data is unchanged but there are a few cartridge/bullet/powder combos that have either been dropped, added, or changed.
The Speer manual is fine, 14th Edition is their current one.
Another good cross-reference source is Hodgdon's online data center...lots of data for Hodgdon, Winchester, IMR powders.