You can't beat the Iota chargers for performance, reliability, and price. They're available in sizes up to 90A. The 75A or 90A versions, with the IQ-4 smart charger option either external or internal, would be appropriate for your battery bank.
You can even combine two identical models to double capacity, if you like.
Check them out online (Associated Industrial and other vendors) as well as at Jackrabbit Marine.