I always get mixed up between the 3 trims, -10, -7 and -5.
One of them is like the HKS GTSS, and will be the one you are after, will get you around 300kw at the wheels, very responsive. the next one up is a bit smaller than the 2530's, and will get you around 340kw at the wheels, still very drivable, probbaly a touch more lag if you can call it that. the next one up i don't know much about.
A smaller turbo normally comes on boost more progressively and smoother, doesn't feel as fast because it doesn't give you as much of a kick in the back.