Hope to see you in Quito. You can't go wrong with a Suzuki DR650 - just put a bigger tank on it - we use the Acerbis 5.5 gallon and it gives it about the same range as our KLR650s.
Your route through Ecuador is a bit too fast. You're missing the best riding in South America! You plan to ride from Quito to Guayaquil in a day. BIG mistake. Take a few days in Ecuador. You won't regret it.