If you like the car, and you have looked after it...then I would go for it
BUT, I would get an extended warranty (buy 3 years you can, cheaper than year by year).... Then it's not just servicing to worry about, big jobs cost lots of money (I had the same pain with an Audi A4, and wish I had)...
The Lease company must do a full check before it's sold too, get evidence of that, and make sure they make good any issues (including paint and windows)