I did a similar deal several cars ago, and it worked well for me
In the 3 years I was paying for it, the second hand prices plummeted, which meant that option 1 (hand it back and walk away) saved me about £2K.
At that point I still owed them about £9K, but the car was worth about £7K
Which option you take will depend very much on how much the car is actually worth in 41 months time
