Let me save you some money. The Eden D410XLT used with a WT800 in bridged mono is immensely loud. It projects enormously, and is even more dominating off to the sides. A 1x10 would add nothing to the setup and I question what a D210XST would even do since both are less efficient than the 410 and hence would not only be smaller, but quieter, running the same level of power.
When I first started using Eden, i tried running the 410 with the 15 and I was better off just running the 410 by itself. I can assure you that I have never had anyone tell me that I was playing too softly.