Need help new body G1/GH1/GH2

Hi,

I need a little help deciding on a new body. I am currently using a GF1 and love it but I really would like a body with a high res VF for use with the new 100-300 lens and my existing 45mm PL Macro.

I can get a G1+14-140 lens cheap on ebay (2nd hand), or get a GH1 or wait for a GH2.

For me the important things are not video, but high ISO performance and fast AF for use with the 100-300 and 45PL macro. I can see that the GH2 has superior performance here but this combination will be much more expensive and do I really need it.

I really would appreciate being able to make clean ISO1600 shots "IF" required in the field. Also, if the AF is so better on the GH2 then it might be awesome.

Can anybody pitch in with some advice if you own any of the above?

Cheers, Scott