does not matter who you visit.. revo,apr,abt, supersh!ts - 260/270hp is the max you will get with a remap alone
you want anymore than that and you will need to start upgrading intakes, exhaust and eventually turbo. Plus all the extras such as brakes,suspension so you can handle the extra power...
if ABT guarantee that your VW warranty will remain in tact then that is what you are paying the extra for and imo is worth it, but I would double check the small print as if it is anything like supersh!ts then its not worth the paper it is written on
but Erik if they have offered this to you for free then what you fannying about for get it done you wet paper bag