TSPP is a game that you either love it or hate it (or think it's just okay
Sure, I can get tired of it at times, but when I come back to it, I love it like it was new. I have both tspp and wh2o, but could not trade both for woz.
I could get rid of wh2o way before tspp.
I wouldn't do the trade. If you really want woz, try and get a good price on a used one. I think more Woz's will be available when TH is out and prices may drop. I've personally seen several available close to me - they haven't been hard to find.
You might find out you don't like woz all that much after awhile, (just about the time you'd be ready to revisit another game of TSPP.)
If you can pull off buying a woz, you have the option of selling any of the 3 without sacrificing a game under pressure to trade.
If you think your initial feelings for TSPP might return, it'd be a drag to have traded it away.