5.9 Tuning state of the union

I'm FINALLY ready to get the EFI installed on my 5.9 Dart.

I'd really like to run a factory 96-newer smpi ecm and wire harness. What's the best way to tune this? I'm running a stock cam for now but would like to install a mild cam in the near future.
Some say Hemifever, some say others are tuning this ecm with good results. What's the most flexible option? I want to be able to modify tables myself, not just download maps.

Thanks in advance!!