what makes a good weapon (damage/delay) in your opinion?

[eski2]

Focusing on damage vs delay and raw damage... because in some situations a large damage slow weapon is what you need.

I seeem to recall there was some threshold where if it was very slow, you got some sort of damage bonus as well, but that's a vague and untrustworthy memory now.

I used to rank weapons, all other things being equal, by damage/delay but the stats and procs and such make calculations impossible. However, just thinking for a moment about damage and delay, when would a slow weapon be equal in value to a fast? Would you say the value = (some formula) or is it just a gut thing?