No experience but if your looking for fastest spool & 450 whp, one would think something like the 68HTA should be worth a look.

If you have more funds & don't mind a bit slower spool but the potential to make more power if your goals change, the 3052/3076 options are an amazing all around turbo. I ran the 3052 for ~6 years, no complaints. Only swapped because someone wanted the turbo & twisted my rubber arm so I could get a DSM 82 HTA (current turbo have had it 6 or 7 years now). In comparison, my first turbo the evoIII16g kept me happy for 2 years.