i was wondering what size board to get of the marek. I weigh 195lbs. i usually ride a 139 era which i like a lot. what are the benefits of going up in size?

u def need to be on a larger board. i would say a 139 is for someone in the 150-175 range.

Demo both of them if possible. U will love the 141 if u like the 139 3ds, but I would go up in size depending on what ur riding style. If u wanna go bigger, land more stable, and have a little more underneath your feet get the 146, if your ridig cable, hitting rails, and want something quicker underneath you get the 141.

i understand that for going bigger in height, the bigger board is needed... but will the board reduce the speed of my spins, slow my inverts... etc?

GO with the 141