It's probably late in the game.. Ah.. I wish I'd seen this thread earlier.
Well, unless you've already bought the T-400.. or if you just want some more good advice on headphones.
The Shure SRH440's are fantastic value for the money. Very neutral and natural sounding and balanced headphones. They have a tad coloration in the upper midrange and Hi's, but nothing close to harsh nor Sibilant (unless you EQ them) - they're not the most portable cans out there (as advertised, they're designed for the home and studio for monitoring), nevertheless, they're easily driven off of a portable player.. but of course, will reach the full potential when amped (try fiio E-11 with the extra bass boost) Here's the thing though, change the stock ear pads with the SRH840's, which are beefier, thicker and softer and definitely more comfortable. They will enclose your ear all around and provide a fairly good seal and isolation. Actually, one of the better isolating cans I've had. It's $20.00 for the pads, and trust me, best $20 I've spent in years. Also, if you have additional $10 to spare, purchase the straight cable as opposed to the coiled one. Coiled is nice and sturdy, but, the straight will open the your portable options immensely.
As for Kicker. Very very nice cans, and definitely a steal for their price. But hey, if you want to save even more, buy the Monoprice version of the 541's. Essentially the same headphones with a different name, and about 2/3 of the price. They're very punchy and quick and definitely could benefit from a proper break-in. Also, some people argued that replacing the pads helps the sound imaging to balance out overpowering bass and harmonize the Mids and His even more. Though, I'll say this much, sound stage is definitely different than Shure. Shure is wide, spacious and engulfing. The Kicker is warmer sounding and definitely more forward... It pretty much does justice to any music you could through at it whereas Shure would prefer Jazz, Classic and Acoustic.. However, being myself who primarily uses the Shure for Trance music, I can't really say much more.
Also, read this thread.
Very nice headphones presented by a Headfier that really knows his $hit when it comes to quality budget headphones (and Higher end ones as-well. Ask him anything, he'll be glad to help out.)
http://www.head-fi.org/t/571005/the-panasonic-rp-htf600-s-headphones-more-fun-than-the-hd650