As far as games that are like Sacred 2, you might find both Diablo III and Torchlight II to your liking, as they're in the same vein (isometric action/rpg) and both offer great story, gameplay and lots of loot. If you don't mind looking into some older games, the Diablo series (1 & 2) is the obvious place to start. The original Sacred, of course. Titan Quest, Dungeon Siege 1 & 2, as well as the Silverfall series are all decent action/rpg's. Some are a little more dated than others but they're all really good.
Also, if you can find them and you have the 20GB, 60GB, and the older 80GB models PS3's (the backwards compatible ones) you might try looking for the Baldurs gate and Everquest action/rpg's that came out for the ps2. They were really great. Baldurs Gate and Baldurs Gate II were put out by Black Isle studios, Champions of Norrath and Champions:Return to Arms were developed by Snowblind Studios. Well worth tracking down if you can find them.