I am glad to see the topic i started didn't blink out of exsistance while i was in York, Maine.

My personal favorites are the Defiant, Excelscior (Standard), Ambassador, Galaxy, Klingon K'tinga class/D7, Negh'Var and of course the Constitution Refit.
in Reply to the Power of the Romulan Warbird, between the Fire power of a Warbird and Negh'Var I'd go with the Negh'Var in a heart beat.
The following stats are from the Daystrom Institute Technical Library:
www.ditl.orgNegh'Var:
2 x Mark 18 pulse disrupter cannon (These are what it fired at DS9 in "Way of the Warrior" that blew out the shield grid in one volley.)
18 x Mark 12 disrupter cannon, total output 205,000 TeraWatts
8 x Triple Fire photon torpedo tube + 2,200 torpedoes
D'deridex Warbird:
6 x Class 21 disrupter cannon, total output 65,000 TeraWatts
12 x S2 photon torpedo tube + 800 torpedoes