I daily drive my race tune, for fun, really though it is so the trans is always ready, and with care, i can get as good as fuel economy in the race tune as any other. My truck is just under 600whp, and i wouldnt mind some more, injectors would wake up the turbo some and i have been told 650 should be easy, that all being said, i can surprise any would be competition, and pretty much beat anything that trys to give me a run as it is, also, i am not sure how much more "the srteet" can handle, power wise that is, traffic, cops and the lack of drivable (at breack neck acceleration and speed) roads being everywhere, i can see 700-750whp truck being a huge handful to dialy drive, 650 is an insane street truck, i have had fun in my truck every time the engine starts, and it is still very reliable. This is another reason i am considering with extreme seriousness buying a vette, over building my engine, there is also the trouble factor
, more power more potential to get nailed, at least for.me, i dont have much "hey you shouldn't do that" built into my dna, im more of a "how much can i get away with" kinda guy, when it comes to driving and street racing, its not a good thing, and has not served me too well, now no vehicles are in my name and am under my wifes insurance, hehe, yeah I've had some tickets, and another 150-300whp ain't gonna help anything
I dont know if the op has a tuned up rig now, but i would take it to the brink on the stock internals and see how you like it, chances are you may be satisfied there, afterall, a vgt 72 some 40% injectors, a stroked pump, boost pipes and a few other tid bits and you got some beef boy, there is no denying a tuned dmax is a force to be reckoned with....
EDITEDITEDIT
i see from the op's sig he is pretty tuned up, so i guess it is gonna be your judgment call brother, i too am wanting more but am.not sure