Not being an a**, but a few things...
1. You cant "make" it an srt version, thats american stuff.
2. If you get wheels, get some nice ones, no dumb designs or anything.
3. You can lower it and make it handle amazing for an suv. ( I have a ton of suspension mods ).
4. Please dont do any body kits, the pathfinder styling is perfect stock and if you do itll look ricer.
5. Dont even consider using shackles or things that compress the springs, itll ride horrible and be unsafe.
6. In terms of engine, you cant do much other then some basic stuff. If you want real power its going to cost you real money, alfredo24 did a turbo setup and is pushing 425 at the crank, i believe hes building the block at the moment to run more power. So it is possible just not cheap. Talking 3k+ just for the turbo setup.
7. I posted a bunch of my links in another thread recently and ill copy them here for you. As of right now if your looking to make your pathfinder more "street tuned" i believe mine is the best example on this forum as of now.
Links:
Full Sound System:
full-sound-system-install-lots-of-photos-t518024.html
Intake Mod:
my-intake-mod-t444483.html
Painted Chassis/Underbody:
painted-underbody-t452233.html
Suspension:
2-lowered-nissan-pathfinder-r50-se-t447754.html
Airlift 1000:
installed-airlift-1000-walkthrough-guide-t547252.html
FogLight DRL Mod:
did-fog-light-drl-mod-how-to-t552278.html
LED Drls:
installed-a-set-of-led-drl-s-t535893.html
Upgrades Tierods,Balljoints,Bushings,swaybar links:
replaced-most-of-front-suspension-lca-p ... 51438.html
Random Thread with some pics:
fresh-detail-painted-calipers-new-headunit-t515985.html
Front Control Arm Brace:
installed-the-missing-link-aka-control- ... 33661.html
Plasti-Dipped 20"s:
going-to-plasti-dip-my-20s-t552919.html
Thats all i can think of/remember at the moment.
That should help you get started.