Sure you can get to 1700+ with the blue rep gear.

Check this thread (a bit old now though) : http://www.arenajunkies.com/showthread.php?t=17182
1850 rating with a new lvl 70 char. (With an exeptional partner ofcourse )



I leveled a rogue to 70 and the Time played this level: 0 days, 1 hours, 33 minutes, 48 seconds. Me and my mage friend went 1861 with the record of 29-5. In case you were wondering my stats are 7.9k HP 1591 AP 20.79% CRIT and 79 resil as SHADOWSTEP.