You're never LOCKED into one tuner. You DO have the right to go elsewhere.
And as to personally recommended - do you think if these guys were dodgy and werent vouched for, that we would bother to put them in a stickied thread for our users to go to? I think not. They're ALL good, and if you want to know if your ECU/ECU mod is supported, then get your yellow pages out and let your fingers do the walking... that, or spend all of 60 seconds using the search tool.
Information is at your fingertips, if you'd only exercise them. And no we're not going to tie your shoelaces. As much as he looks it, Nightcrawler is not your mum.
-D