Put a spray in bed liner.
Don't go with Rhino($350-425)! They are sorry compared to the competition in both price and quality.
Line-X is probably the best in price($345-375) and about second best in quality.
Speed-Liner appears to be the best in quality, (they actually use kevlar in their liner). They also have the coolness of 16 factory colors to choose from, (non-factory costs a little more). Thay are comparatively priced($380-425) considering the better quality.
I hate tops on a truck bed and aren't fond of plastic liners either, maybe it's just me but i can't wait to jerk the plastic liner out of the truck that I just bought.