Catalogue Crisis!!

Hi

I just recieved my GZG catalogue, and after googling over the
absolutly massive selection of minatures in all shapes and sizes, I
have a few questions before I order any.

First, how big are the models, is the size in the magazine a good
indication?

Second, is there any difference between the different fleets?
-For example does the ESU prefer dreadnoughts or NAC prefer pulse
torps

Thanks in advance to all who answer!
Jonathan 
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"Only two things are infinite, the universe 
and human stupidity, and I'm not sure about the
former."
- Albert Einstein
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thegreatkraken@postmark.net