So guys... I don't usually push suggestions but on this occasion I highly recommend the Comply TS200 tips for the H300. http://www.complyfoam.com/products/ts-200/
That is until the mighty vmoda bliss 3.0 fittings take the crown!
Just kidding! What do I know - my ears are easy to please :)
Seriously though, I finally just did a quick ab between the mh1c large tips and the vmoda bliss tips on the h200 (c3/bh combo, daft punk lose yourself to dance). Seems to me that the vmodas lessen the mid-bass somewhat, resulting in a tighter bass, seemingly more details through the midrange, possibly a bit more treble extension, a more balanced sound, while at the same time completely reducing "the peak" (like the mh1c tips do). So in summary, although both tips sound awesome on the h200's, the vmoda tips to me refine the sound to some degree over the mh1c tips.