I think I saw something in this thread about doing a similar type of review overall for suppliers. (I am too new to start new topics in this part of the forum, so sorry if this is hijacking) I think that would be great. There are so many vendors, it is impossible to sift through them all.
I would also love to see a master list comparing suppliers and showing the basic of what each supplier offers. Possible columns could be for example: location, # of flavors, PG/VG, range of liquid volumes, PV models, DIY liquid, mod supplies, and then the final column could be a rating that linked to that suppliers review. If there was a way that suppliers/or even regular customers could fill out basic info and go back in for updates when offerings changed it would be easier to compile such a list.
I know I am just coming up with all kinds of ideas that would make more work for you.

Are you using a database to fill in your charts and reviews? (PM me if this is even worth considering. I may be of some help, though it has been years since I did any DB driven pages)
I really was really looking for a listing of size/ml bottles of liquid range (ex 6ml-100ml bottles) for each supplier. Does a master list with this info for the suppliers already exist? If there was one place where you can see all the suppliers with larger sizes/ml bottles, that also sell smaller sizes/ml bottles, then along with the flavor review and other info on this forum, you could determine a shorter list of suppliers who meet your individual needs and standards, Then you could "preview" the flavors of that company by buying some less expensive smaller ml bottle and then when you found ones you loved, you know they also carry that in an extra large value sizes.