I will be helping with this project. Both are 32v units and are working just fine. Mark wanted to go with a newer, more efficient unit with a built in charger. These Trace don't have the sophisticated readouts like the new units that show draw rate, battery condition, etc., but they would be a great buy for someone with a 32v system that wanted to add an inverter.
Buy both and wire them together for a 5000watt system like they are now or use one and keep the other one for parts just in case.