Silk is on a different network than Seras, so the limitations are a bit different. I just want to see the performance difference between Silk and Seras to make sure that this is a wise thing to do. Anyways, one Seras server almost costs as much as two Silk servers so if Silk is able to perform adequately, then there may be enough money to get another server.
Anyways, keep giving Silk a try. Let me know about any problems you're having or any problems that you had that went away. That sort of info helps me debug any issues that may arise.