The 980 has a massive stage and is clear as a freaking bell with a much deeper bass experience than anything listed. Not one of those listed here even come close. However, they are heavily neutral sounding and not that fun compared to the others. Its the best sounding non inner ear bud to ever exist.
the pk1 is very fun and colored sounding, but it has a tiny stage and is bested by the sennheiser MX580 in terms of overall clarity and kick. It only has slightly more bass than the MX series' cheapest set at like 25$ outside of that there is no significant difference. Its flat out the worst buy I've ever had along with the HD595 lol >.> Does it sound awful? not at all, its very fun lively and energetic sounding but again it is about 90$ too expensive
the tm5 is kind of a middle of the road thing, i havent gotten my own set so i can only go by the few times i did hear it. It is not nearly as colored as the pk1, but its also not nearly as neutral as the mx980. Its...a less colored version of the pk1 as i found the bass and overall clarity to be very much the same.
As for the CX980, it is incredibly deep sounding and very spacious but not at all comfortable lol. Its stage is good, but for an inner ear bud it is not that special as my Fischer Audio Eterna and Silver Bullets smash them in every way and are far less expensive. However i have no idea if they use the same stuff as the mx980, thats a great question someone should ask sennheiser about
so, my final advice to you sir is if you want something of the highest quality and clarity in a non inner ear bud, the mx980 is leagues ahead of anything else on the market and totally unique. It is not so musical and fun as the others, but side by side comparisons prove it is just in another world of clarity and overall quality.
if you want something fun, get the Mx580 instead of the pk1 and save yourself like 100$ lol. They are 90% the same thing except that the pk1 has a smidgen more bass, staging and clarity are near identical, heck, if you have that budget then go for the MX880 instead which is even more musical and fun sounding than the 580 but still less expensive than the Pk1 rofl.
if you want an inner ear bud, Eterna/Silver Bullet Hippo VB ftw man...you cant do better. fhew, long post, hope i helped lol
Edited by swbf2cheater - 8/21/10 at 5:14am