Since you seem to be interested in DIY. I would start with Carly to get things rolling, when you need more power get newest version of Ista. Carly goes in the glove box as a quite useful tool if you were to need it while on the road, or if you use it to monitor engine activity.

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03 3.0 Alpine/Blk (sold) Sport, Prem, CWP, PDC, Xenon
10 35d Titanium/Blk - Sport, Lux Seating, Prem, CWP, Tech, Rr Climate, CA