My neighbor has the 4000-09 and I've got a 4100-09. At the time, I was able to buy the 4100 on the Web at the same price as the 4000 (which was on sale locally). If the 4000 were available for 1/2 the price of the 4100, it'd be a no-brainer. The improved safety features on mine are safely stored away in their holders; didn't know about the more powerful motor. The main reason I bought it was for the stand.
As for the book, there's a ton of them out there. Taunton Press would be a good place to start.
If you've used circular saws and radial arm saws in the past, I think you'll find a table saw doesn't replace either one well. I use it mostly for ripping small (say, less than 4' length) stock. For long rips, I still use a circular saw and a straightedge guide. For that reason alone, I wouldn't spend a lot of money on a table saw. (However, if you're getting into the cabinetmaking game, then a high-quality table saw (not the Bosch 4x00) is indispensable.) For crosscuts, a compound miter saw. If I were going to buy any new saws, I'd look seriously at the Bosch 5412L Dual-Bevel 12" Slide Miter saw -- Oh! the temptation!.