Well as to you Wardad I'd prefer an escort or just waiting the two months for frigates, then to arming a transport ship for combat. I prefer loading out my transport ships for maximum cargo storage because of the fact that eventually I'll get troops and want these ships to be able to deploy them.
Frigates don't take that long to research so I usually get them rather quickly but when I am trying to research something else I make due with escorts.
But I have managed to take out frigates with Escorts so it all depends on the way you arm them

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[ December 04, 2003, 05:52: Message edited by: Starhawk ]