First of all, welcome to the forum.
Secondly, you might want to drop the abbreviations and txt spk because it will get you insulted here more often than not.
Third, I spoke with a factory rep from PTR a couple of months ago (their factory is a couple of towns over from me) and he said that the GI was as reliable as any gun in their repertoire. Personally, I have never fired the GI model, but I have fired one of their earlier versions, and have had my heart on one ever since.
Lastly, I don't think a full power rifle round alone is going to keep you happy for long. There is a lot they can't do, like harvest small game, or feed your rifle affordably, for that matter.