PS3 is due to be soon or so i've heard, and Xbox2 is also due out very soon too.
ok, a good way to choose is to look at the current batch of games available for each one, which games do you prefer? the Xbox is better spec.
Wait til after xmas, like boxing day and Saturday, and go straight out to the shops see if you can find any sales on. Go early during the day as there will be a lot of people wanting to grab the good stuff.
Check prices online too.