Well, Broadswords are actually slower than hounds by 25. Faster than a hound is the Talon, Wasp, and Thunder right now... aside from the Thunder (which I'm convinced is alien super technology
) these are dedicated interceptors.
I'm not really sure what kind of ship would match your description: As fast as an interceptor, enough weapon mounts to hold credible PD, enough hull/shield to survive being engaged with heavy fighters long enough to kill them... that sounds like a super-ship to me. Turn one of those PD into a railgun or a AM blaster and you have a ultra kite machine. And make it cheaper than a frigate... youchers
I do think there should be a hullmod that gives PD an aiming bonus - make it track like elite crew without actually having an elite crew (or better yet a fully accurate intercept solution) would be a nice mod for lashers.