There isn't any system that sux.
But if i really have to make a comment about each please let me do so.
ps3 = great, but not as great as what my $600 can do. It should be $400 and i would love to have one.
xbox360=great and powerful, especially if u get premium(originally $400) for $300 just like i did.(go to microcenter all over the United States, this deal last until 12/31/06)
wii = great and fun, but $250 is bit overpriced. $200 would be fair deal(take out the wii sports and lower the price to $200 and i will say it's a great deal!)