I'm pretty sure the Phiaton's would be better than the HD 229s, but cant' say for sure.
I have a pair of the MS 400s in the mail, on the strength of their styling and a single
quick listen I had with them last year. Just like the way they look and their portable size.
But here's yet another idea... Look at the VMODA M80 and buy custom shields to go with them
http://v-moda.com/on-ear-shields/ . The M80 is a good performer and super portable. I've
listened to these on a number of occasions at my local Radio Shack.