one more thing..when you start an arena team (5v5), make sure you have good teammates that are decently geared to make up for some of your lack of resilience or you'll all get one shotted by people like me =) Have the best geared run up and start causing trouble first to maybe draw aggro. Successful or not, even if you only ever get 1400 rating, some points in arena every week is better than zero.
If you start at the beginning of a season, you'll have all you need in a few months and be totally geared before next season. You can do just as well with your season 2 shoulders if your team never tops 2000...Season 3 shoulders are a status symbol because they present the LEAST stat change in upgrade, but they sure are pretty =)
Good players are rare and if even one sucks, your team won't get as far as it could no matter how skilled you personally get, but don't get frustrated..when you surpass everyone in skill and gear, just stay with them until you decide you want your shoulders or maybe a gladiator dragon, lol. I'll be doing the same after i get my helm. I'll be needing my sword, and damn right, my shiny shoulders. Hopefully, they will step up and gear/skill up by then. PvP and PvE are the same in many aspects, one being that without progress, it's all a waste of time.