from what ive learnt, most cases of turbo engines blowing up is due to users being too enthusiastic with the boost controller haha...and slipshod workmanship...not really due to the engine being 'turboed'
if im not mistaken, the Dpro turbokit will be cheaper than PZ's supercharger kit...
i guess it boils down to what type of power delivery u like, instant, linear power or nothing...nothing then woah! and of kos...kepishh kepishh :P hehehehe
if u like autocrossing and the likes then i guess supercharger is the way to go, with power all over the rev range
just wondering tho, ive read about cases of broken cranks on the s4ph engine...donno why? .if i had the budget, and a campro-equipped car, i would give it a proper engine balancing together with big power-adders like superchargers or turbos