I love the Shifters Unbound series. I've read all of them, including the novellas. You really can't go wrong with Jennifer Ashley. Plus they have bear shifters as well as big cats and wolves.
Her worldbuilding started out pretty simple, but she's really fleshed it out over the course of the series, and they aren't all sex the way so many shifter books are. The first book was good, but the series has continued to improve as it goes on, rather than dropping off the way so many do.