As DareDevil said... it really isn't about the ship; that's what makes this game so much more fun than most other online games. The balancing is almost flawless. Yes, it's easier to be good with some ships than others but it's not about ping or big guns. The heavier ships are most popular, yes; but the really good pilots will beat you with anything up there: Personally I've been absolutely destroyed by Gryphon in a Perseus, QD in a Myrmidon, Tepanator in a Ulysses and High Ace in an Ursa and the list goes on.. (those that have flown against these people will know what I mean).
Just because most pilots seem to fly with Erinyes doesn't mean it's the best. Yes, it's fast and fairly maneuverable and has that fearsome set of primaries, however those same primaries will drain damn quickly with twin Kaysers and it only has a limited missile capacity. It is also not impossible to out-maneuver, it's definitely possible in a Herc2 and it's even possible in a Tauret if you're good enough, and that's just out of the heavy fighters.
Also, to emphasise DareDevil's point: What's so bad about getting beaten to smithereens? People seem to get so upset when they're outclassed. This normally happens because the other pilot is BETTER than you, and since this is the case; you'll learn far more easily and far faster when you're being 0wned. I'd rather be 0wned than fly against a newbie who has no chance of beating me... simply think about what you're doing wrong, HOW they're beating you and you'll pick up tricks and tactics, and invent your own to beat them...if you work at it, your flying will improve faster in 3 TvTs than you will in 20 Coops, ESPECIALLY if you're the underdog.