I prefer to play Samurai Showdown, Waku Waku 7, Kizuna Encounter and
You can get 'NeoWave' for the PS2. It was the first non-neogeo KOF,
but IMO Bloody Roar is a much better next gen fighter.
Look out for that on the PS2, Gamecube and Xbox (cube version is
better, but no blood and funny control pad; I would like to try Bloody
Roar Extreme on the Xbox).