Here's my 2 cents - drive both and see which one you like.
Having had manual with my 911s and Tip with my Boxster - I have to say that I like them both. While I miss the times of racing around with the manual transmission, the tip is nice for it's convenience and in town driving.
About my only gripe with Tip is that the shifting is linear vs the random in a manual. Meaning if I am coming into a turn and want to go from 4th to 2nd - I have to downshift through 3rd on my tip - where as on a manual you just go from 4th to 2nd. Not really that big of a deal, you just learn to start downshifting a bit earlier.
But as someone else had mentioned - the transmission will likely depend on the car that you find. With my box, I didn't anticipate on getting a Tip. But due to the great deal + condition of the car - I couldn't pass it up.
Good luck and let us know what you find.
