Definitely go with the upgraded shaft option. The shaft is the engine of the club - without a good engine, the club will never perform at it's highest capabilities.

With all the new oversized drivers on the market (over 360cc heads) you definitely want something with under 4* of torque. Beware, the less torque, the stiffer the shaft (usually, but not in every case). A stiff flex with 3.9* torque would be comparable to a reg flex with 2.5* torque. Ensure that the shaft has been frequency tested or put on a flex board to determine if the flex matches your swing.

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Gord

Quote of the month:
"It's easy to see golf not as a game at all but as some whey-faced, nineteenth-century Presbyterian minister's fever dream of exorcism achieved through ritual and self-mortification." ~Bruce McCall