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Since all you need as round robin (or similar - idea being it doesn't matter which server a given connection ends up on), almost any load balancer will work.
For software, take a look a LVS or HAProxy - both will do what you want. If your needs are even simpler, you could even look at nginx, or varnish if you wanted to consider caching.
For devices - honestly at low traffic levels anything will work. I'm not too well versed on the lower end of the spectrum here, but in the mid-range the Foundry ServerIrons tend to be the best performance for the dollar (however, they are not exactly fun to configure).
I think the decision on what to use is if you can live with a single point of failure in your load balancer or not. If not, the devices may be easier to setup auto failover with.
-Phil
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