Well you will really have to look into the new mods of the gear, especially if you pvp. Do you visit the pvp forum? There will be some threads giving you advice. In the trade forum you will find which items are sold, and mostly pvp folks are buying items there. Basically, strategies in pvp changed due to new mods. E.g. "Splintering" on weapons is a new one people go for, "reactive paralyse" on shields, "damage or fire eater" on armor... . Just read a bit and post your questions in the pvp forum, you might get some useful information.
If you play a mage, the "basics" former pvper tried to achieve are now easily done; all 70 resist/100% lrc/40% lmc/int increase/mana increase/mana reg etc. etc. is no prob at all.