Which Mountain Bike?

[ImBAE]

I'm replacing my old mountain bike; I have a choice between a used 2015 Trek X-Caliber 7 and a new 2017/18 Trek Marlin 6 and I'm trying to decide which one I should get. Is the newer Marlin 6 worth the extra cost?

2015 X-Caliber 7
~$400
Pros-
Better Saddle and Brakes
27 Speed
Free lifetime maintenance from local shop
Cons-
All original components
Worse Drivetrain (Derailleurs, crank, and cassette)

2017/18 Marlin 6
~$500
Pros-
Better Drivetrain
Completely New
Better Tires
Cons-
More expensive

 

[ADarkDraconis]

I like the idea of free lifetime service, and a good saddle is important. I would probably go with the X-Caliber 7 as being a 7 it would have been a step up from a 6 when new and there is a significant price difference between the two from the factory (new the X-Caliber 7 is over $900 here.) As long as it is in good shape, which most local shops do a nice job of checking and replacing anything on a used they sell. Use the extra cash towards stuff you want for the new bike (lights, fenders, pedals, anything).

If you still can't decide, which one is prettier?