I noticed that suprasport.com is now offering the sp61gt direct bolt up turbo for MKIII. I wanted to know what is this turbo like in comparison to the t3/t4 they offer in terms of spool up, peak power potential range, and reliability. If anyone has this turbo let me know what you think of it . I want a turbo with fast spool and be able to supply the air for 450 to 500 rwhp and do it reliably. Which would be best for the job?