Just about any wakeskate will be fine for the cable. Some boards do have a composite/ protective bottom like the Tao from Obscura or any Integrity board, but Remote skates are designed with urban winching in mind. They are designed and tested to take the abuse of the team thrashing them on concrete ledges, smashing into rocks and other obstacles. Taking them to a cable park where all the rails are a nice plastic is nothing.
Wakeskating isnt to the point wakeboarding is design wise with flex, core materials, molded fins and channels.
Basically any wood concave from a solid brand (Remote, Obscura, Watermonsters, Byerly,) would be fine. For the most part they all offer a board from 38-43 inches in length and the main thing changing is just the concave shape.
Remotes: ride fast with their base material, hold up really well to rails and obstacles, really steep/dished out concave, solid boards and company
40.5" Remote Hooker for $249
41" Remote Horan for $249
Obscura: the Tao is the main cable board with a wood core wrapped in composite material. Really poppy, designed for Daniel Grant who rides cable 95% of the time. The wood concaves like the 2014 Shift should be solid and have a rail friendly base as well. The 2013 Impulse/2014 Format is a solid board and shape as well.
2013 42" Impulse for $119
Watermonsters: Great boards, the concave is a little more mellow than the Remotes but works all the same. great company to work with as well.
Byerly: Basic wood concaves, nothing overly special about them. Cheaper price wise than the remotes.
39" Byerly Heritage for $149
41" Byerly Heritage for $149