Things I have learned are always buy more than you want or need right now. If you think "oh that would be nice but we don't really need it" then get it, you won't be sorry. We have a 8317rkss and love it. We added everything we could to it and are not sorry at all. Make sure you have good trailer tires and definitely a good hitch. We have equalizer 1200lb hitch and it works excellent. Enjoy! I have a 2011 F350 6.7l diesel. My Father just ordered the new ecoboost. You will definitely have no trouble pulling that trailer.
2011 Rockwood Signature Ultra Lite 8317rkss to come
2011 Ford F350 6.7 Diesel
2004 Honda VFR 800
2005 Brute Force 750
And most importantly, a loving wife, 2 year old son and a NEW BABY GIRL NOV.30 (I do it all for them!)