Well, fair enough, if money is not too big a factor, obviously the A64 is a better chip than Barton. The OP did not give us any marginal cost benefit analysis on his friend's behalf so we obviously can't judge that.
My point is there is a good case for going with a cheap and proven platform at this time given that there are so many upcoming changes referred to above. This is always the case but this year does look like more of a watershed than we have seen for some time.
batmanuel, I just (pre-)ordered an AthlonXP-M 2500+.
I've been doing a lot of research these past few weeks getting ready for my first build and just when I was ready to go for a locked 2500+, hoping for 11x200, I stumbled across the frenzy over at amdmb.com about the XP-M.
XP-M frenzy
I like the theory and just hope it pans out for me. The theory is the XP-Ms are hand-picked by AMD so they can sell chips that run at a low stock voltage to the desktop replacement market where heat is obviously an issue. What's more, these chips are apparently unlocked - who would overclock a chip in a laptop, right? Apparently 2.7 GHz is attainable with 2.03V and water-cooling!
I won't be going that far but I hope to have a nice overclock and then retire the chip to an HTPC and undervolt it.
If more people substantiate this, those chips are going to be hard to find - that's why I just dropped everything and ordered.