xp+mac+ubuntu

i have a acer laptop aspire 4710 (1 gb ram+160 gb hdd+1.6ghz) i m currently using os combination(xp+vista + ubuntu) but now i want to change and experience new os.... pls suggest me whether i can install n use one of this combination of (xp+win7+ubuntu) or (xp+mac+ubuntu)........ i dont want...