Headphones:	Logitech Wireless Headphones for MP3	Jabra BT620s	Plantronics Pulsar 590A	Nextlink Bluespoon Spider
Sound quality (Hi-Fi A2DP mode)	1st	3rd	2nd	4th
Sound quality (phone - HSP/HFP mode)	HSP not supported (no mike – only for A2DP playback)	Not tested	1st	Not tested
Bluetooth range	2nd	3rd	4th	1st (has a Class I radio, as opposed to the Class II radios of the other headphones)
Connection stability with MDA Vario	2nd	4th (according to the author, the connection isn’t even kept through the human body – that is, the MDA just can’t be placed on the left)	1st	3rd
Pros	cheap; good RF in spite of Class 2 Bluetooth; excellent sound	long active battery time; can use regular miniUSB cable to charge; pretty comfortable	pretty good sound in both Hi-Fi and HSP mode, clear mic voice; analog audio adaptor can be used on other BT A2DP clients; includes hard carrying case	BT Class 1 RF
Cons	notorious headband breaking problem (can be prevented by reinforcing); included audio adaptor cannot be used with other A2DP clients	bright blue circle light is kinda distracting (but it can be switched off: just press both sides simultaneously for a few seconds and the blue lights will go out); 60-150Hz is over-emphasized	relatively short range; included desktop charging stand is not necessary, and possibly breaks headband; button layout	relatively weak at very low end bass

Legend: 1st: best, 2nd: second best; 4th: worst