Anything you want really, you just have to be aware that an anemone will always win, so if it decides to take a walk, it'll sting what it touches. Being that your getting a nem first, you can let it settle in and find its spot, whitch is nice.
BUT.
1. since you only have a 24 gal. be aware they can get REALLY big. mine reached almost 16 inches before it split
2. Im guessing your new to the hobbie, since thats what your tag says. its a REALLY good idea to wait 6 months before adding an anemone so your tank can stabalize and it gives you time to figure out how to keep all your perimeters very stable. anemones are very sensative to changes