Instead of WOZ pickup a Simpsons Pinball Party (Which is on your wishlist). Same design and software team, similar layout, better theme with great artwork, already proven to be a great game, and best of all it's only half the price.
I actually think I like some parts of the TSPP layout better as I think it makes better use of playfield real-estate. For example there's not much to shoot for with the upper right flipper on WOZ besides the witch targets, on TSPP you have a side ramp, Comic Book Guy standup, and the Kwik-E-Mart U turn shot which you use to hit the bully stand-ups. It also has a 3 drop target bank (I&S) and captive ball which WOZ doesn't have. Also, does anyone know if WOZ has a physical ball lock?-similar to the couch.
The playfield advantages that WOZ has over TSPP are the lower left bumper area (Really cool!), 2 magnets (could be a nice addition depending on their implementation?), and way more stand-up and rollover targets (I'm not a huge standup fan, but i'm sure they'll be integrated into the gameplay well). and a second mini-playfield which looks pretty sweet. WOZ is also a widebody which could either be a pro or a con depending on how you look at it.
Overall, i probably like the layouts about the same although it's tough to judge WOZ without playing it first. WOZ also has extra things like the LCD Screen, Shaker, topper, emerald green trim (yuck), and pdi glass (Awesome!), so you are actually getting a lot of extra features for the money.
Personally, I'm waiting it out to see what the final product looks/plays like and may pick up a standard edition if I really like it. Sure it won't have the Emerald Green treatment and plaque, pdi glass, shaker, or topper but that stuff really isn't all that important to me and some if it could be added later if needed.