Cervelo S3 Disc (new) vs Used S5 rim

trivial_poursuivant
trivial_poursuivant Posts: 1,136
edited January 2018 in Road buying advice
Have the option to get either of the above at about the same price. Yes the S3 Disc is new but an S5 is an S5 and it’s with Sram eTap gears but minus wheels (not an issue as I have a few sets)

What to choose? I’m really torn