I had a 2016 Limited CVO that I traded in on my 18 Limited CVO Anniversary. Prior to trading, I read some of the horror stories of the M8 engine sumping, and was concerned that I might get one that sumps. Another concern that I had was further depreciation on the 2016 model and any potential problems it might have with additional mileage put on it. A lot of the good that I read about the M8 made me believe that I would leave the 2018 stock if I traded. Also, I liked the color of the 2018 better than the 2016. Therefore, I figured that if I traded, I could either buy an extended warranty from Harley if I thought I needed the extended warranty or I would simply trade the 2018 in on the latest and greatest at that time if the 2018 wasn't reliable. I brought the 2018 home on April 21 and have put 1500 miles on it so far. I would have been riding it more, but where I live, there has been so much rain the past month and it is continuing to rain. I like the 2018 a lot better than my 2016. As far as problems on the 2018, I have defective TPMS sensors that are being replaced under warranty. During the 2 years that I owned the 2016, I did not have any problems out of it, but I only put 9800 miles on it because I rode other bikes more during that time.
For my 2016, I paid, MSRP less $3,000 discount plus freight and tax. I paid MSRP plus freight, setup and tax for the 2018. I found 1 other 2018 Limited CVO Anniversary in an adjoining state for MSRP plus fees, but it wasn't suppose to be delivered to that dealer until June. If the dealer is offering $1,000 off the 2018 model, that is a very nice incentive because I have read most of the 2018 CVO's have been selling for MSRP or over MSRP.
Good luck with your decision.
Charle