Serviio

I have a router that has both the 2.5 and 5 bands. I only use the 2.5 due to the shorter range of the 5.

One thing that you might want to look at is how close your neighbors are and if they are using the same wireless freq and channel that you are. If they are it could slow your network down. I have a program at home that I can run and it will scan the area's wireless signals and tell you what channels your neighbors are using so you can pick a non used channel. I will post what the name of the program is when I get home today.

Most people use Auto channel and it does a terrible job of finding an unused channel.

I own a Linksys WRT600N and it have 2.4 and 5 GHz. I have experienced with mac laptops this problem when sharing files (File server) and as DLNA server . Connection drops and takes some seconds before reconecting again. Macbook is the only one laptop with this behavior. You should consider to use a wired connection just for diagnostic.