Great thread here, I've been toying with the idea of dropping Xtend from my order due to the price and not really noticing a major difference in using it. To be honest I'm still on the fence, I do take it because of what I have read and not because of how I feel.
As for pre-WO supps well that's different. I do notice a difference in my focus and concentration but due sides such as stomach cramps and the runs I tend to use them sparingly. I tend to stick to good old Red Bull half an hour before if I feel I need it.
I also use good quality whey protein, multi-vit and fish oil as well as joint support and as such I'm looking to trim my spending in this area a little so BCAAs look likely to go along with the pre-WO but for the amount I use I have a good few months worth stocked up.
"If you want to look like some Abercrombie model, then find another program and enjoy your nice, easy training style. If you are serious about adding muscle to your frame, then get under the damn bar and make it happen"