You'll want some kind of underpadding. If you can spare the money, the hydro turf padding is the best but blue camping mat from walmart works well too and also doesn't absorb water.
Style and cut is all personal preference. Cut turf has sharper edges and therefore better traction than molded turf but of course molded turf is smoother.
Don't use the stock sx sides, turf the rails bare and cut flush with the bottom using a slight taper up so water has less to grab. Do LOTS of searching on here for installing turf if you've never done it before.