I would agree with Wii at 40 million before ps3 hits 20 million as definately possible, but 50/15 is a little bit of a stretch

Wii first of course, is better question What is going to happen first?

PS3 20M or Wii 40M ??

 A tad too optimistic methinks. 

I can see you are implying that the PS3 will quickly close in on the Wii's gap in sales, which will never happen, so of course, the Wii will reach 30m first. PS3 will always remain at 50% of Wii's user base at most IMO so by the time Wii reaches 30m PS3 will be approaching only 15 mill if it's lucky.

the wii will hit 30 mil before ps3 hits 20... This is too obvious... How can you bet against the wii in this situation.

A better question would be wii 35 mil or ps3 20 mil.

Ps3 should be closing the gap on the wii in the near future, but the wii is more appealing to the general public, so i would expect the wii to have an edge on the ps3 (especially when bluRay players get cheaper).
The 360 is the weakest console, and it just sucks.

According to leo-j PS3 will hit 20 million first. I even resign the Wii will get to 30 million before the PS3 reaches 20 million.

Yeah, better question is Wii:40m or PS3:20m... that might actually be close.

wii for sure

wii will hit 30 million first, way before the PS3 hits 20 million

Well let's look at this Logically...

The Wii is 12 Million units ahead of the Ps3 at current.

It is selling on average (Over the last 2 months), well over 100K more units per week WW then the PS3.

Taking into account big games For PS3 (I'll ignore any for Wii), I'll lower that outselling lead to just 50K per week WW until it reaches thirty million.

With the Wii being 6.79 Million away from its target and the Ps3 being 8.59 Miilion away from its target.

The only logical conclusion is that the PS3 will win.... I mean... the PSP will win... Uh I mean...

 Truethfully though,I believe the Wii will be at 34 million units when the Ps3 reaches 20 Million...