OK been going over the old stuff again (duno how many times i've read this stuff) but i guess it only makes more sense now after reading so much more than b4 when I had no clue at all.

I've concluded that xforce are better than ITR OEM ones (from what I can infer)
but not a significant or noticeable difference (i assume)
therefore going form ITR -> xforce = waste of money
but
VTiR -> xforce is
anyways, cutting to the chase
I've decided that 5zigen is the way to go because the middle ground is always a better place to be rather than feeling a slight gain and much regret later down the track with all these "if onlys" plaguing my mind.

Yea I know it's kinda retarded that I am answering my own question in a sense but obviously i am not the final word. I could be wrong and please feel free to correct me or even point me in a better direction for my purposes (obviously dont just go TODA FTW) but thanx for ppl who have read and replied already.