They are both very good in different respects. the more popular seems to be HP tuners. Here are some useful links: (1st is a PDF)
http://mysite.verizon.net/whenn1/HPTUNERSvsEFILIVE.pdf
http://forums.corvetteforum.com/show...uners+efi+live
these programs come with a certain number of user accounts so you can get access to one of those for cheep from someone who already has the software (as it was explained to me). Even without wideband, both are better than the LS1 edit.
SRQC5
P.S. Excellent site By the way. thanks for the invitation. Ill look forward to spending alot of time on this forum.