I see what you mean now.
I'm not a networking expert (

), just thinking out loud here;
- Could you "up" your hispeed internet service to a faster connection? Wouldn't this relax the bandwidth so to speak?
- Realizing most of the problem is in your home network is it possible to "up" your wireless router speed with different hardware?
Also, is it absolutely necessary to have your SB wireless? Or is running wires not an option?
Bob