In terms of other switches with four 10G ports, there's the HP 1950-24G-2SFP+-2XGT (as the name might suggest, 24xGbE ports, 2xSFP+ ports, 2x10GbE ports) - same setup as the Netgear S3300 28X more or less but with a heftier price tag (~£700 here in the UK) so not sure it really belongs in this thread... but certainly a contender. It's spec lists a dual-speed fan for quietness but how long it'll stay in quiet mode I'm not sure...
Code:
Acoustic
Low-speed fan: 19.0 dB, High-speed fan: 44.5 dB;
ISO 7779 Dual speed fan