JVC HA-FX40 cost even cheaper than my Sennheiser CX200 - you sure they will sound better than my current earphones? oO

Good day everyone. I`m new in this forum as I`m new in world of audio. I`m about to order Cowon X9 player and I have some doubts about earphones. I have Senheiser CX200 but I think they will be too weak for Cowon. But since I`m newbie in that kind of stuff I don`t know what to choose. When...