Give him Inertial Armor, and maybe Improved Inertial Armor, if you don't want barding. Try Psionic Fist and Unavoidable Strike, he'll be deadly. Focus and Specialization in Bite, maybe Claws. Maybe Multiattack.
Oh yeah, put only 2 points in Str, 1 in Dex. That way, they both get a modifier +, instead of just Str getting it.
If you just want to be odd, enhance his claw attacks to be Throwing and Teleporting. That could just be fun.

However, if your GM has a few IQ points, he won't let you do that.
he might like Speed of Thought, Psionic Charge, Mental Leap, and Up the Walls. Those are awesome at mobility enhancement. You can make 200' leaps with no roll, if you have enough Speed of Thoughts. (and boots of Strde/Spring, and Ring of Jumping, and Mental Leap . . .

)
When he's high enough, Dimension Door is awesomeness. Catfall is natural, Burst is fun, Far Punch is too. Talons might be useful. DO NOT get Bite of the Wolf, it is equivalent to Talons for the panther (+1 average damage, and one level higher). I think that the Metaphysical Weapon chain effects unarmed/natural weapons. Animal Affinity is also natural, Claws of the Bear will make him rock, especially when combined with Multiattack, Talons, Lesser Metaphysical Weapon, Psionic Fist, and Unavoidable Strike. Bite of the Tiger for next level, Improved Biofeedback is nice. Displacement is awesom, Metphysical Weapon is a natural step up. Prowess is useless. Next level, Polymorph Self might be good but then he wouldn't be cute and fuzzy anymore

( ), so get Telekinesis and Dimension Door. Next level, Ectoplasmic Armor, the others don't really matter. Next level, Breath of the Dragon = firebreathing kitten, Etherial Jaunt is cool, Shield of Prudence stacks with Ectoplasmic Armor.
Hope that helps,
-Jeph