they actually have a hybrid gt3540. and being an inline 6, 4 litre you would expect that. it also has a cropped compressor cover to limit output.
it needs a large rear housing to handle the exhaust gas it flows but the cropped cover holds it back so saying its a "good" turbo is nothing but usless for your application.
9.5" tyres are great but what about the rest of the stuff thats required for traction? shocks? diff cradle? pineapples? bushes?
and more to the point as you step in larger turbocharges you move the power band
the hks gt-rs, 2530 and hiflow are narrow powerbands which give you linear power all the way through, that is good fat midrange and not peaking.
the 30's series turbochargers and up are usually larger exhaust housings which give you
lag lag lag lag lag lag, power, wheelspin, change gears
but its your $
do what you like
the best setup for a 30 sized turbo would be proper exhaust manifold and external gate instead of internal gate on the stock maniifold