Here are four more in addition to the 1M I think are worthy of consideration that I don't think have been mentioned yet...
1. E46 M3 Touring (BMW M did a concept, but the car never made it to production. I'm giving serious consideration to building one in the not-too-distant future. If I'm going to do it, I'm going the CSL route, except manual transmission - so E46 M3 CSL Touring)
2. Lancia Delta Integrale (not sure if I'd want the production road car for homologation or the Group A rally car -- decisions, decisions)
3. BMW 507 (saw this at the BMW Museum during our European Delivery trip and instantly fell in love)
4. BMW E30 Touring (sorry, another wagon/hatchback