If you're going to a redwood, get a dually. They're heavy 5'ers with a heavy pin weight. That model has a GVW of #16 and a pin weight of #2404. Everyone Redwood I see are being pulled by a dually and a few owners I talked to, switched from a SWR to a DRW. Check out the redwood forum as well to see what the owners are using to tow that model with.
Those are some nice 5'ers, good luck on your choice
2013 Prime Time Tracer 3200BHT
2016 GMC Crew Cab Duramax All Terrain
Ribs in the smoker and Whiskey in hand