I would recommend the Masho as well. I bought one after having tried a Mr. Limpy, which I didn't like. I like the smaller size of the Masho and it feels fairly soft and natural.
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I'm not quite sure what kind of packing gear/underwear to suggest though. I've tried 'regular' jock strap underwear, as well as a packing brief, and men's regular briefs with a fly. Neither of these work very well for me; the packer moves around too much in my opinion, and it becomes very uncomfortable. I'd welcome more suggestions and advice on how to pack better, too.