what mod chip to get?

[ED!]

Theres alot of information in the Sticky above you, but going off my personal experience I wanted to get a Messiah2 but the modder I went to said he could get me a Magic that was flashed to behave like a Messiah (fixing some of its issues), so I went with that. Has worked like a charm, but appearantly does boot up games like Splinter Cell - ah well. And I dont know many people use the + writers because ps2 reads - alot better. Even reads the cheap "-" Great Quality DVD's I've used. I have a Pioneer A05. Cheers.