MIDI sequencer help
 

I've recently brought an ION IED05 eletronic drum kit, I've given it a go using all the default kits and as i expected they all sound pretty weak. In order to add new sounds to it i need to use a midi sequencer to run it through. can anyone recommend me a decent (or at least usable) sequencer, or another way to add my own sounds to the kit instead of the default ones.