my friend just bought a set of Polished C-series for his 250R and they were WAY shinier than any douglas I have ever sceen, And I have 4 brand new rims ordered 2 years apart on mine. It almost looked liked his were chrome they were so shiny!
Now if you get the unpolished ones the douglas will be way shinier in comparison. I don't think the ITP's spun tires like the Douglas which gives them the bling bling factor if you get the polished ones. Sceen it with my own eyes, and it's not a little difference it's ALOT! However they are too heavy for my tasts. .5 isn't a ton but 2 lbs difference or even 1.5 is alot. Since you multiply by 10 for rotating mass. THats like removing 30 lbs of junk from yur banshee, save another 4 lbs by getting real tires (shaved Extremes) and save another 80 lbs worth of dead weight.
Believe the Ultimates are much Heavier but also alot stronger but I am not positive, they are about 3x-4x the cost too, so I don't think they are worth my time.
This is for the normal C-series I guess the others are for 4x4's as mentioned