My 2017 DL650 is the first Suzuki I've owned, But coming from an '01 Kawasaki ZX11, the fuel injection and ABS are nice. There are several threads on the forum dealing with windshields and buffeting,No one has said the aftermarket windshields are inferior to stock, and folks seem to be happier overall. I am in the "Stock-is-just-fine" camp. Easily removed and adjusted for height with four, 5mm broad-face hex head screws. I think it does a good job of shielding wind and bugs, and the aftermarket has fully caught up to the 2016> generation as far as accessories, tires, exhaust, etc
If you are thinking new, your dealer may be able to get you a sweet deal on a new 2019, or even a 2018, even if they don't have one in stock. I bought my '17 in May 2018 and got a huge rebate, free setup and $825 retail value panniers and mounts.