I'm doing the very same this Saturday (the numbers have risen to 16 now!), so I've made a huge batch of Curry 2 Go style base and a smaller batch of Zaal base, and my brother is knocking up a Taz base, so we're going to see which gets the most votes.
I did something similar, albeit on a smaller scale (4 people) last night, using two different bases (C2G and Zaal), and in a blind taste test there was a 50-50 split between the two, so it will be interesting to try it with larger numbers.
Be sure to let us know how you get on, Mick, and I'll do the same!
Cheers
Gary