I forgot to mention that I finally got a copy of Sherman, by RP Hunnicutt. My Sherman Library is now complete! Actually that's not true, but don't tell my wife! I one the Ebay action while in San Diego, and the book arrived shortly after we did. It's a first edition, without the dust cover, that's in fairly good condition. I probably paid too much, but it wasn't my maximum bid.
While in San Diego I did manage to visit a hobbyshop, Discount Models. I picked up an Extrapac version of Eduards M4A3, for only $19. IMHO, Eduards "Extrapac" versions of the M4 chassis are nowhere near as good a deal as the Extratech, but they are a bit cheaper.