Greetings!
Hello Enchantress, and welcome! I hope that you enjoy yourself here!
Might I also suggest that you think about a Ring of Mind Shielding, and perhaps customizing the ring with a few other special spells like Mage Hand, and Mage Armor. I also like a Ring of Animal Friendship. That is 12 HD worth of an animal friend, for anyone who wears such a ring, so you don't have to be a Ranger or a Druid. If your DM will allow you to augment the Ring of Animal Friendship, which I think costs 9500 GP, with an additional property of the same thing, thus making it have 24 HD worth of animal power in the same ring would be cool. That would cost if I recall correctly, (19000 GP). Of course, having a pair of 12 HD Dire Wolves or a 24 HD Dire Tiger as a companion for a Sorceress can come in quite handy. I might also suggest that having (3) 8-HD Dire Apes could be fun, too.
Wands of various kinds can be very powerful for you as well. Also, don't overlook the usefulness of having a Hat of Disguise, Heward's Handy Haversack, and a Decanter of Endless Water. These items, among others, are not terribly expensive, but are quite useful, and they also have enduring value no matter what level your character is.
I hope these help!
Semper Fidelis,
SHARK