best tuner...
Your best bet would be to start here https://ls1tech.com/forums/pcm-diagnostics-tuning/368718-read-me-best-ls1-tuning-software-best-scanner-best-handheld.html in the tuning software sticky.
With a $499 starting price & real time tuning custom operating systems available for little to no extra cash outlay for most 99-04 pcm's you'll at a minimum find out software to be highly competitive

HPTuners...
next post
EFI LIVE...
yeh man, just read up on each tuners page and see what you like.
Hptuners.com
efilive.com
they are each others top competitors, so they basically have all the same features, just the GUI(Graphical user interface) is a little different


