Recommendations for load balancing two nodes with sql

So I have two servers live. They have same processor, everything is the same except different amount of ram.

Both have access to san

Server A:

windows: 2008 standard sql: 2008

Server B:

windows: 2008 R2 sql: SQL 2008 R2

Is it possible to have these two servers load balancing the traffic for the sql database?

SQL Cluster will also be setup to replicate the databases across the two nodes.

Any specific or best practice I should test?  Also, any issues with the current setup?

If you have any other recommendations, I would love to hear them. My first time setting up nlb fresh.