I have two Bosch 1617's that are both 15+ years old. Used them for hand work, router table and as a spindle in a home made CNC machine. Burnt the main bearing up once due to the latter but replaced the bearing, which was fairly easy and about $20, and it just keeps running.
Only complaint I have is that when fine tuning the depth adjustment the motor body does get hung up a little on the base. The small knob can become hard to turn. A little jiggle between the two helps. Maybe they have addressed this on newer models.
Probably best, as stated earlier, if you can get hands on with them to see if you like the depth adjustment of one over the other.
Regards,
Shane