I'll second Barford's motion for the MYRIAD program. Mine is called "Melody Assistant".

MYRIAD also offers a freeware reader, but I'm not sure if it does the MIDI conversion thing as does "Assistant". At any rate, you can download a limitied-feature trial version of "Melody" from that site an give it a whirl.

I have had MA for a couple of years now; it's not perfect, but the price is right and they are constantly upgrading (free upgrades as long as you are registered for, gosh, life I guess).

Support is really great via e-mail and user forum, considering that it's based out of France. Some users claim that it's comparable to music notation programs costing in the $200-$300 range. It's got a lot of bells & whistles that I don't have a clue how to use much less have any use for.