The answer depend on several factors.
Business or home use?
What capabilities do you need?
For business use:
Stick to the big boys: Cisco, HP, 3COM, Nortel, Extreme, etc. Although, if it is for business use, You’ll really want a managed switch.
For home use:
The consumer-grade switches: the ones you can buy at a retail store are fine; such as Linksys, Netgear, D-Link, etc.