Thanks for the replies... I knew the xtr's were a great crank but I just wasn't sure how much of an upgrade it was from what I already have as I couldn't find much info on the Truvati's. I think shouting myself an xmas present is in order here.

FYI: the xtr's seem to retail for about 1000 here in Australia, but the ones I found are going for less than half price.

One last thing - these xtr's come in 175 mm only - is that the standard? - and also when checking the length on my current set to compare - is that measurement the full length of the crank or from bb bolt hole to pedal bolt hole??