Any opinions on the Apex'i single turbo conversion ... the RX6 ball bearing job???? Comments appreciated ...

 

If that is the type of performance you are looking for, then it's a great option. Provides ample power (over 400 rwhp) and still spools up fast to retain streetability.
Apex'i has a reputation for making extremely well made products.

Not sure on price, but it's probably a pretty penny...