The 150sx is still probably the most fun MX bike I reckon. I had one for 3 years and it was just a blast to ride.
From MXA magazine: For this episode of First Ride we take you on an inside look at a couple of the 2 strokes KTM is offering in 2015. The KTM 150SX and the KTM 250SX both feature a lot of the components that their four stroke brothers have been updated with. KTM is still putting tons of R&D dollars into the 2 strokes which is nice to see.