I don't think you'd want that, man. The wheels are staggered for a reason. Square wheels could improve the feeling of balance inherent to the car but it would do so at the expense of steering weight. I can feel a pretty substantial difference in steering weight when I switch from my winter AP1 wheels to my summer AP2 wheels, and they're only one section larger. I can only imagine how it would feel with a wheel three sections larger (than AP2).

To answer your question, I would change nothing. Neither of my two gripes with the car could be cured with OEM parts. The paint sucks suck sucks and I want bi-xenons.

 

00 nfr w/ oem front lip, side strakes, ap2v1 wheels, ap2 radio door cover, honda titanium shift knob, cr trunk and wing, oem vented hood mod and call it a day for me
Ooh! And oem soft top and frame since I no longer have mine :/

 

Royal Navy Blue Type S with the brown (not tan) interior.
CR Suspension, AP2V2 wheels.
OEM Hardtop, black.
OEM sidestrakes.
F20C1 w/F22/AP2 transmission and differential.

That's good for me.

 

It looks like CR parts and AP1 motor with AP2 retainers for most. My list is similar to others but I really like the European Ulimate Edition model.

2006+ GPW AP2
Black soft top
Black Hardtop
CR seats/Beige or Red leather interior
AP2 short block
AP1 head
AP2 retainers
AP2 transmission
CR suspension
CR aero parts
CR steering rack and stiffener
CR wheels and tires
AP1 RPM faceplate
Base HU with XM module
CR shift knob/JDM titanium knob
CR trim accents
Euro Headlight washers
JDM backup light
Euro folding side mirrors

 

2756 is the official weight for the AP1: http://en.wikipedia.org/wiki/Honda_S2000

Not sure why mine comes in under that. It could be that the gas tank wasn't full.

 

moonrock shell

cr front bumper
ap1 rear bumper

cr suspension

ap1 motor
ap2 trans
ap2 harness, :genbey ap1!:

accord front brakes

ap1 interior

ap2 4 channel abs

ap1 steering rack

ap2 rear diff

ap1 black interior with red seats

 

08 CR with Laguna Blue Paint, Tan interior, and AP1 flywheel.

 

I got an AP1 mostly stock, although I replaced the oem clutch w Sachs, steel braided clutch line, TEIN monoflex, poly bushings in all suspension arms, Megan Racing engine and transmission mounts, '04stock wheels, and blue canvas top on a Silverstone grey so far. And some worn parts needed replacement.
If I were to build ultimate S2000 w oem parts, I say:
AP2 transmission (shorter ratios)
Do the valve retainers upgrade
AP2 headlights (mine original are fading)
Mugen catback exhaust (stock-ish)
Custom fab a air snorkel
And nsx brake calipers.
The Ultimate Unlimited Tune?
NA 400+hp engine.
Target weight :2300lbs.
The mix of Opera modified swiss-cheese reinforced frame, Spoon front and fenders, and C-West body kits, ASM carbon doors.
Spoon coilovers, AP Racing calipers, and instead of f20c; a Hayabusa V8 engine! I guess w some hewland transmission and custom bellhousing to make it work too. Oh yes, no windshield so it can be called a speedster. And a dark British racing green paint.

 

Since many want AP2 retainers here is a pic comparison. Quite a difference. AP1 on the left and AP2 on the right.

[attachment=57613::]

 

Yeah. Almost forgot the CR interior, esp the seats. They're pretty nice. Didn't put it in my dream list. It was this or red leather seats.