I'm using the comfies on my SR-325 phones and was using the L-bowels on my SR-125 phones. I got a pair of GS-1000 bowels today. Didn't like them on the 325's--seemed to thin out the bass. OTOH they've really opened up the 125's. Using the comfies or the L-bowels I thought the 125's were "enjoying" a bit of a mid-range hump compared to the 325's that made them sound muddy in comparison. Putting the GS-1000 bowels has really opened them up--now they are a very enjoyable, well-balanced set of phones. The bass is not as dynamic as the 325's bass but it's not bad at all.