Own both WOZ and Hobbit and are beautiful games - probably two most perty games (BBB is pertiest). Code is deep and complete and they are different. I'm not in love with the layouts, but the code, lighting and video/sound immersion really make the games a blast to play and watch.
I played DI at Expo a few times. If it was a different theme, they would be selling like crazy. Layout is more fun that the previous two JJP games. Toys feel skimped a bit compared to WOZ and TH. I'm confident the code will be deep and complete when all is said and done. One I'm keeping an eye out for.
Agree with others. Pick up a TH play it for a year then go for a DI.