Thanks for the responses and info everyone, its much appreciated.
I hit the range again last night and gave them a second shot and im glad that i did. The longer irons 4-5 are going to take some getting used too but the rest were playing much better and very straight. It was clearly me the previous night, i had just been for a run and it was over 100 outside. I'm english and not used to existing in such temperatures! Not to mention the weird grass they have over here in the US.. Its like hittin off uneven straw!
On a side note, i also hit my brand new FT-IZ tour 10.5 voodoo stiff last night and what a beast that is. Bombs straight down the middle 9/10 of the time. Reallly pleased i picked that up for $90 on ebay.
Anyway thanks, im keeping the clubs and im going to work on my game.