I voted against more tuning options but then again I wouldn't care what people do with their own cars. I doubt PD will ever change the tuning options to the point where cars like Mustangs/Camaros/GNXs get 1,000hp and are out-running the likes of Enzos and Aventadors in a straight line. And I'm sure Ferrari and Lamborghini wouldn't be so enthused either.
I personally don't see the benefit of shoving 1,000hps into my Mustang Cobra R. It just seems like it wouldn't work well in actual circuit racing and I can't really recall a time in my internet surfing career which includes most likely 1,000+ hours of watching car related videos from several media websites where a 1,000hp Mustang Cobra R actually existed for the purpose of circuit racing. Usually people who have the money to create such monstrosities use something more practical. For Gran Turismo, every other car having 1,000hp is just out of place.
Also there is no drag racing in GT. It was never actually mentioned as an offered feature, though we organize these types of things by ourselves. Drag racing is a really techincal motorsport which deserves more attention than a quick fix patch. I'd rather wait for a fully fleshed out and implemented Drag Racing mode in GT6 than get it quickly worked up and thrown down to us for $3.99 at the Playstation Store.
ALSO Another thing I wanted to speak on was the experience of 1,000hp. Now I've never been in a 1,000hp car IRL but I've ridden in a 450hp '04 GTO. There wasn't a lot of upgrades to it, but for someone who drives a 220hp Taurus SHO that 450hp is INSANE. I honestly couldn't imagine what 1,000hp would really be like. One of things that GT doesn't really do
that well is convey speed. I like the dynamic chase POV but it needs more... even at a track like SSRX it doesn't really feel like I'm going that fast because there is nothing really forcing that effect. 600hp, 700hp, and 800hp... these figures are all pretty damn intense and I don't think its right to overlook that and I think people really need to appreciate that power.
In a game like Gran Turismo where magical numbers appear with really no solid explaination and there is no solid effect forcing speed, it's easy to want more out of cars and I'd expect this reaction to occur often. But I think its how GT presents tuning and speed in general that makes it so easy to overlook the absurdity of 700hp. I understand there are Youtube videos of 1,000hp Supras and Mustangs, but there is a lot that goes into a project like that... it isn't all just buttons and fake credits. There's man hours and money, research and custom fabrication, metal work and so on... GT's tuning just isn't that deep.
At the same time I can also make the arguement:
You know Kaz goes down to Sema and there a lot of crazy, customized rides down there of course. You know what? I want to put 10 LCD TVs in my car and also design a speaker wall for the trunk and I want cheetah skin interior too. No, you say? Well how come
he gets a 1,000hp Mustang Cobra R which would require just as much customization if not more and I can't have a simple show car? I'm tired of stock interiors, just like he's tired of stock engine power. And then I get laughed out of the GTplanet forums

but then again that's almost how I look at wanting more power. It's as ridiculous at cheetah skin interior and a billion LCDs in every concievable panel. But that's just how I look at it. 2 cents