Excellent Question!
We took a poll of Headset Advisors and here’s what they like:
LEITNER WIRELESS Headsets!
They feature digital sound on Computer Mode! We especially love the LH275 (Catalog # 2349)

LEITNER CORDED USB headsets! SUCH great sound quality!
We especially love the LH255 (Catalog # 2354) or LH265 (Catalog # 2355) [PRODUCT DISCONTINUED]

MB660
WOW Just WOW to these bad boys! (Catalog #2371 for non-Lync [PRODUCT DISCONTINUED], #2373 for Microsoft Lync!)

The MB Pro 2 UC Bundle!
(catalog #2255 non-Lync, #2257 for Microsoft Lync!)

KALM EARBUDS! (catalog #2286)
Active noise canceling and decent ear-bud sound quality!
