I'm looking for a rolling style secure tonneau cover for my truck. I won't post links but the makes/models I've found so far are: Roll-N-Lock M Series; Retrax Retrax Pro; and RollBak G2. I'm leaning towards the Retrax Pro. Does anyone here have that one (or any of the ones I've listed) and would they recommend them or not? What are their strengths & weaknesses; ease of installation, level of security and weather sealing? Are you running something I haven't mentioned that you'd recommend? Also, I'm considering a grille guard - I had a Westin on my last truck (Tacoma) and ended up having to grind the powder coat off and coat it in bedliner. Does anyone recommend any other grille guards? Have any pics? Any advice is welcome...thanks in advance.