You didn't specify a price, budget could mean 100 bucks! Brando up there said Natrix, and I second that. Or the XL, I have both (in CF). Great knives imo!
Or a little more money gets you a Bareknuckle. Aluminum handles, 14c28n blade, and IMO near ZT quality and feel for 1/3 of the price. Love mine, it's in the case next to its siblings (the natrixes and the 0770cf). Seriously one of my favorites.