Advices needed....

[lofish]

I have been using a panasonic ZS7 with an Inon D-2000 strobe. In general, i am happy with the pics but I am thinking to get a 4/3 camera. Oly has different models but i just dont know which one to choose from. I want to start with macro first, then add a WA wet lens or real WA lens later. I also want to keep using the d-2000 strobe. I heard the 4/3 cameras are slow in focusing, is it a issue that i should consider? So which model / lense should i pick???

thanks so much!

BTW, here is the link to some of my old pics...
Flickr: underwater soapbox's Photostream