Resin pads will still pull you to a stand still though metallic/sintered pads typically work better in adverse conditions and provide a little more bite at the expense of *minimal* modulation and a bit more noise.
Having never used any of the Elixir Series of brakes, I can't comment on how they perform but if there is minimal difference between the 3 and 5, go the 3 and upgrade the pads (it will depend on how much OE pads cost however...)
On a side note, I've been trying out some of the pads offed by
Disco Brakes on recommendation from this forum - been using them without any dramas for a month and a bit now in both Shimano and Hayes systems. If you're after cheap pads that offer good performance, maybe give them a go.
Good luck!