Hi Young Aussie!
Welcome - you'll probably get lots of answers to your inquiry. The Contemporary and the Polynesian are both wonderful resorts, although very different in architecture and theming. I've stayed 3 times at Contemporary, and although I'm not all that fond of the decorating scheme, it is a luxury resort with lots of amenities. There are great restaurants and shopping there and you feel like you are in the center of the World when the monorail comes whizzing into the resort. You are close enough to the Magic Kingdom that you can walk to it in about 10 minutes, which is handy when the MK closes and the buses and monorails are crowded. You can also hop on a boat at the marina behind the Contemporary and in 10 minutes be at Fort Wilderness or Wilderness Lodge for dining or exploring. The other parks are just a short bus ride away. Iv'e heard rumors that the Contemporary is going to be completely redone/redecorated in the next couple years.
The Polynesian is a beautiful resort, just like visiting Hawaii. Lots of lush vegetation, a trickling waterfall and tropical planting in the lobby, meandering paths through the palm trees, and a sandy beach where you can lay back in a hammock and watch the fireworks over the Magic Kingdom. I've never stayed at the Poly, but would love to. Again, excellent dining choices and amenities. It depends on what you prefer. The Contemporary and Polynesian are next to each other on the monorail circuit, so you can hop off and explore the two resorts, then hop back on the monorail for a short trip to the Grand Floridan if you'd like to look around there, too. Then on to the Ticket & Transportation Center, where you can board another monorail or a ferry boat to the Magic Kingdom.
Are you renting a car? If you are staying at a Disney resort you can use the buses or monorail to get just about anywhere you need to go on Disney property. I know some people (ourselves included) who have driven to WDW and then parked the car and didn't drive it again until it was time to leave.
Early November is usually a good time to visit. The weather will still be warm, possibly quite warm, but not sweltering like it is during summer, and the nights should be quite pleasant. I did visit in November a couple years ago and it poured down rain almost every day and was quite humid, but I don't think that's normal. The Wine and Food Festival should still be going on at Epcot in early November, and that is quite an event.
We are heading to WDW next week (Wednesday, 19 January) and are really excited to be able to spend a week at Pop Century. I hope you have a wonderful visit when you go. It's never too early to start planning.
Have fun.