Its a lose lose for us. If you want to save money/get experience and do it yourself buying a cable and using tuner pro and winflash is a cheap solution. If you convert it to LS pcm then your spending 1500+ for that, and either 700+ for tuning software yourself or MORE to have it tuned.
I have been tuning mine myself with the help of Joe this past year and Pizza back in the day, I learned a lot from them. It is a good alternative for bolt on's and cam. Changing displacement and adding boost is a whole different ball game.
On a side note I'm trying to make my own 24x reluctor / junkyard parts kit for a cheap conversion alternative.