If you can make ATLEAST $250 it might be worth it. But I would caution against selling the biggest console of the generation for a more expensive, less stable one (sales-wise). Since money seems to be an issue perhaps you should look more carefully at the 360, its not my thing but damn its cheap. Sure I see you like MGS4- awesome game, and some other exclusives, but what about what MS has. You surely don't want to be on this board next year hoping to trade a PS3 for a 360.
Another reason to be cautious is price. The PS3 is bound to drop the most in price over the next year or so to stay competitive. Do you really want to buy a console that will go down in cost significantly soon after? On the other hand I suspect Nintendo will keep the Wii at $250 for a VERY long time? It seems likely thay they don't feel a crunch since usually outsell both of their competitors combined.
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