Up to you. You don't need the 2.0 cable, so you can save money if you buy a 1.3 cable used, although, they tend to go quick.
This is a discussion on tractrix cable 2.0 good or no good ? within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; yes i have a 2006 wrx tr just asking if the 2.0 cable is worth buying or save for the ...
yes i have a 2006 wrx tr just asking if the 2.0 cable is worth buying or save for the cobb
If you already own a laptop I'd say it's a no brainer. Laptop & cable is far more versatile than an AccessPort, and you get better polling rates.
As Matty said, you can get away with the 1.3 cable, it doesn't have a memory card port for stand alone logging, but it is more durable than the OpenPort 2.0 cable. I got my Tactrix OpenPort 1.3U for $140 new online..
But heed EJ and Mainframe's advice if possible.
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2005 STi WRB w/Silver BBS Stage II OpenSource tuned by: Mattypants @ WTF Tuning
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Awesome thanks guys , so the 2.0 does me no better