My 2 cents - I don't think its a "trade". What you have is a peace of history. Not just any written history book some where, but a living piece of history that breathes flames. Once shes sold, and driven by a new owner- you can never get 'that' back. Sure you can sell her, use that money to buy another a rwd car, but that EK9 can never be replaced. Don't fool yourself.
If its time to move on, then its time. Cars are about happiness, and that comes in many forms. Life is short and I believe its important to have fun with what life we have, and do whats makes you happy. Do what makes you happy.
---But who doesn't like to get sideways? Just saying---
Good luck