Tekken 4 without question, I seriously cannot wait for that game. A close second would be soul calibur 2. I owned Soul Blade on psx (Soul Edge as I believe it was called elsewhere), I didn\'t get to play much of the first soul calibur on DC, but played enough to know that the second will be a blockbuster.
Still in saying that, I definitely choose Tekken 4 as my most wanted fighting game