I believe the only new spells you will encounter are Ice Lance, Spellsteal, Molten Armor, Refreshment Table, and Invisibility and maybe a spell from your talents.
Your gear is going to be upgraded through the roof from whatever you have now.
Quests will also be a lot more fun (at least in my opinion).
Edited, Apr 22nd 2008 7:11pm by Loooopie