1st thing you have to understand is ALL of the current mod chips that are "no swap" were built around the Messiah technology... The Messiah WAS & STILL is the "BEST" chip..... It has been out longer than any of the other mentioned chips and has been field tested and proven......
Now the Magic 2 has its OWN place because it supports more versions of the PS2.... In my opinion, IF the Messiah supported as many versions as the Magic 2 (which may happen in the VERY NEAR future) there would be no question as to which is better..
As far as the Matrix 2.... Only time will tell how good it is...(Although its just a Magic 2 clone with a couple extra features) It hasn't been available long enough to find out if it has any types of problems....
All of the chips are "good" chips because you don't have to swap. But they are all built on the technology that the Messiah came with first....