PS2 Reality Player question

[Slippery Pete]

I want to be able to play CD's containing AVI or MPEG files (NOT VCD's) in my PS2. I read that I need PS2 Reality Player and a mod chip. May question is: Which mod chip for this? There are so many out there and my main intrest is for playing these kinds of movie files... playing backup or burned games would be kewl too.....

I am leaning towards Messiah 2 or Magic 3, can anyone tell me why Messiah 2 is $30 more (canadian) and is it worth it??

txs