A Grip is a good choice. I would suggest a model with grivory handles because it feels more solid. Also a Delica/Endura. CRKT Ripple is super duper smooth. Spyderco Manix 2 if you look around and don't mind buying used (keep an eye on the exchange here), Manix 2 Lightweight if you want a much much lighter version. Spyderco UK Penknife is also a superb option.
I could go all day. What are some specifics you want (handle materials, blade steels, preferred lock type, desired blade length along with legal restrictions where you live, and intended use)?