Well the M30 is pretty shallow-fitting so your ears may touch the grilles. If you find that sort of thing painful I'd stay away.
I know I haven't posted the review yet since I've got to sell them but you may want to consider the Ultrasone HFI-450. It's a deep-cup closed can. B&H has it for $69.99. Quite comfortable if you can live with the moderately strong clamping force. Sound is very decent - not ATH-M50 level but better than the M30. Very slightly rolled off on either end and sibilant out of the box but they settle in nicely.
I really can't live with the clamping force :( I tried the Sennheiser HD205s once and the clamping force was enough to put me off those. So the ultrasone's are probably out of question if they have any sort of clamping force. My hunt continues for a comfortable full sized can which is around the ear for less than $70-80.
Btw- you've made my buy the Brainwavz M1 after the PL30s. I finally ordered them
I would've really bought the aurvana live if they were available for the $60 price.