The only real proble for AMD and consumers is that everyone here is correct.
Frist, Dual Channel does not help performance that much.
Second, the extra cache of the 3400+ is very helpful.
What ends up happening is that for those of us looking in the 3400+/3500+ range, there is a significant discontinuity in price/performance.
I personally have almost always done incrememtal upgrades. If I start off with a new system, after a couple years I'll upgrade the CPU, then after a couple more years I'll buy a new system. In the past this has worked as follows:
486/33 ----> 486/66
Pentium 100 -----> Pentium 200
(Get's fuzzy here...I think I had P2 400 but I can't rember what happened after that)
3 years ago I had got an AXP 1800+ and I was hoping to upgrade just the CPU, but I have Palomino core and the highest I can go to is AXP 2000+ (not much point in that)
So for me, I'd like to get a 939 based CPU, with a 3500+ (or hopefully something even slower) and then in a couple years I could drop in something much faster (maybe FX-55 or something). However, with the current entry price for 939, it just doesn't make sense. To me, it makes more sense to buy Intel with the LGA 775 socket if you are looking for a long term Mobo investment. You can get a P4 3.4 for just over $300, which is a very good equivalent to an A64 3400+, and youget a brand new socket and a PCI-E video card which means you won't have to worry about an obsolete AGP slot in 4 years (AGP cards will probably still be around, but I'm unsure how fast they will be). Also, there will probably be some faster chips coming out for that socket, especially if you start off with a slower chip like the 3.0.
Of course, it might be good to wait for the 1066 FSB chipset, so you'd be able to use those chips when they arrive in the next couple years. And I guess that means it would be good to wait for the NF4 AMD chipset with PCI-e, which is what I will probably end up doing. Hopefully by then the 3500+ is more available.
Anyhow, I'd much rather get a board with a good upgrade potential, but I understand that it is pretty tough these days to get double the performance while staying on the same mobo (like I was able to do with my first couple computers). Still though, given it's performance, the 3500+ should be about $300-$320, and definitely no more expensive than that.
-D'oh!