Will you ever have to haul anything tall in the bed? If so the one piece tonneau will be a royal pain. I would seriously suggest looking at one of the folding covers; they're much easier to deal with in that scenario. I've got a Fold-A-Cover G4 Elite on mine and I've absolutely loved it.
Also, have you considered what sort of bed liner to go with?
I looked up the G4 Elite and that looks pretty cool. Most of the Sport R/Ts that I've seen have the factory spray in liner but you can get it without as well.