I second the move to replace the stock pads! I immediately replaced mine with JVC HAM55X pads pulled from an open box pair for less than $20 USD. Amazon-dot-com has USED-Like New headphones today for $19.00 shipping via Amazon PRIME ($0 cost 2nd-day shipping if you are a PRIME member.) They are AWESOME on the SZ2000! Keeps the kinetic bass slam, but doesn't torture your ears.
They are easy to pull off the HAM55X and slip onto the SZ2000. Simply wipe them down with a gentle soap & water and then sterilize them, and you've got excellent quality pads for your SZ2000.
For the record, I also grabbed a set of the Brainwavs HM5 pads. SUPER comfy. Like pillows on your temples. But they sacrifice too much kinetic slam, so I put them on the HAM55X and gave them to my wife to try..... She won't return them now as they are the most comfy knock-around headphones in the house!
Also for the record, the HAM55X are bass-centric, lower-end headphones that are great with a mobile phone or MP3 player. They have more bass capability than their build quality can handle, and end up buzzing if you try to go really hard with them. For main stream with a little extra "oomf", they are fine. My wife loves them. LOL
Not the most resolving, or accurate cans, but lots of fun so long as you don't try to push the bass too far.