I went with BAS.
For several reasons really;
- I could load the original map or the 170HP map at my whim. So any resets when in for warranty work (and I've had a bit.... :-( ) don't matter.
 
- When making inquiries here in Perth, the only other person that did it wanted to be paid the full price anytime it needed to be reinstalled. 
 
- Other remaps were only 150 HP. At the time that is, and I am not sure if they offer 170HP yet.
 
- Free upgrades to the latest map.
 
- A full diagnostic/reset tool with readouts for anything that the computer reads.
Performance wise, I can only say, "What are you waiting for"....
On road, it is a racer. Easy peasy driving normally, super smooth, but give it some stick and it just takes of. Kangaroo hops are a forgotten thing these days.... My son's Missan patrol ute (last of the turbo 4L) is not as quick, without winding the boost right up and pouring the fuel in. 
I rarely use 1st. 2nd gear take-offs are the norm (same as before the remap) but now it is smooth and effortless. If turning into a side street from a standing start, and I give it to much, it can break traction on the rear inside tyre (265/75) with 4 people in the car. Towing is great. No lack of power to overtake road trains or hiluxes. :-)  (It always seems to me that drivers of other makes of 4WD take offence at being overtaken by a defender.....)
Of road it is amazing. The throttle control, because (in my understanding) it is longer travel and an exponential function now, not linear, makes it super easy to control under low power requirements. I found it excellent when I did the power-line track (rock/hard clay/mud) in January. I could minimise wheel spin easily. In the sand, it is amazing! What a difference! If you don't know what you're doing, you can dig yourself in quite quickly. But if you grew up driving under-powered 4WD's (mainly series Landy's) like me, it's just amazing. :-) :-) So quick to respond and lively.
Funnily enough, I don't think you want much, if any, more power in the dirt. You will just get yourself into lots of trouble. Like my mates who are new to 4WDing and think power is your best friend.... :-) They are a menace on sand tracks. :-(
But then, mine is a 2.2L 90. 
In a 110 or 130, the extra weight would allow you to effectively use a bit more power.
Phill.
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