Its more to do the the principle of paying to play one game online than the cost really, even though those screen shots look great.
Its probably because i look at it like this, for the price of 12 months XBlive and 12 months online play for this game i could pay my TV licence, plus i am a very casual gamer now, even XBlive when it runs out in May is gone for good.
No your right, im a tight ass...