A2's hardware and pricing appear a bit out-of-date. Consider BlackMesh; it's the company I work for, and we run a tight ship in a tier-4 datacenter with name-brand equipment and massive onsite technical expertise.
In terms of load-balancing, I'd agree with earlier posters that you really don't need any for 1,000 visitors a day. As you scale up, I can't recommend strongly enough the use of a hardware load balancer; we've had excellent luck with those from Kemp Technologies, which incidentally run a version of the well-known open-source load-balancing daemon ldirectord. The load balancer then automatically covers your HA needs in terms of a Web front; depending on what you have going on in the backend, a combination of NFS, DB replication, or other service-specific replication configuration, often alongside a deployment of Heartbeat, will cover your data-persistence needs.
To the OP, or anyone else, feel free to poke me via email if you'd like to discuss options any further. I'm a network engineer, not a sales guy, so prices aren't my strong suit, but we can work together to design a platform that you can then get bid on by a number of hosting providers, us included.
--J