Recommendations for wireless headphones (especially for an Ipod)?

I’ve had a pair of wireless Advent headphones for a few years and they’ve worked OK except for an occasionally annoying background rhythmic ticking noise which can’t always be entirely tuned out. More recently the tuning has gotten touchier altogether and the sound will suddenly begin to waver or break up until the headphone tuning is adjusted.

What good quality wireless headphones would you recommend, particularly for use with an Ipod?