There can be some price difference between PD and centri but, it's not as great as people make out when it's noted that most PD kits are complete. Compare complete kits with complete centri and you're in the same ballpark, retail. $5400 is a good price for essentially a complete kit but, I frankly wouldn't compromise, if I wanted PD, for ~$600.
going with a cenri is far from compromising.
the least expesnive kit out there, 8 second potential. i don't know how thats compromising