I have had se425 as well, actually just sold them (loved them, but needed the money). The se425 is flat, the two things you are expecting - comfort and isolation, you will get with the shure olives on the se425. Since you like rock and rap, if you want a good quantity of bass, you will not find it with the se425 (a lot of people complain about bass being lacking in the se425, I personally don't care that much for a lot of bass), if you like anything close to a V signature sound, you won't find it with the se425 as well. If you're interested in a flat sound, with great clarity and mid, go for se425.