id say mace windu would because he is a jedi before obi wan but id want obi wan 2 win because i think hes cool. but id like to see Yoda and the apprentice fight. i dont think so...though windu is a master jedi and well skilled in lightsaber combat,master in form VII vapaad and quite powerful in he way of the force.bu so was obi wan,as anakin stated back in ep.2 "obi wan is a great mentor,he is wise as master Yoda and powerful as master windu".but i doesnt justify the means,all ends with their fate and "the will of the force".Windu is a master of vapaad a very powerful combat form whereas kenobi holds the mastery of the 3rd form soresu...windu with devastating offensive moves against kenobi's formidable defensive style.its tough to say but i would go for kenobi,mindu wll only get frustrated