Hello all. I was thinking about getting a nice pair of headphones (either Sennheiser 212s or 497s) and was wondering: is there any significant difference between plugging them into the headphone jack on my sound card (soon to be an Audigy 2, right now just onboard) and plugging them into the headphone jack on my speaker (Logitech Z340s)? Since I don't exactly have a sound card right now to test with, could any of you provide some advice on the matter?