Help Me Pick A Lens

Here is the poll.

Which lens should I buy?
	Canon 70-200mm L f/2.8 USM ($1,300)
	Canon 70-200mm L f/4 IS USM ($1,100)
	Canon 135mm L f/2 USM ($1,000)
	Canon 70-200 f/4 USM ($600)
	Canon 70-300 f/4-5.6 IS USM
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Update - As of this date I haven't picked any of these lenses. I sold my other lenses except for the 50mm 1.8 and found a used 24-70mm 2.8 lens from Adorama. I've been in love since, although I frequently yearn for a longer focal length. Perhaps one day I will buy one, but not until I buy the new Canon 600 flash.

Please feel free to provide any comments that support your choice from the list above, or provide another choice not listed.