I am currently using a Hartke 3500 with a Hartke Pro series 1800. I actually love the way this combo sounds and plays. The negative is the weight and bulkiness of the cab. I rarely ever have to pass 4-5 on my amp playing beside 2 marshall half stacks. I would love to have a much lighter cab for our smaller venues. Does anyone have experience using the 3500 head with the 2100 cab? Can it handle the 3500?