Well, the host I personally use is Nfoservers.com;
I have the 10 core VDS package you can see from this link.
http://www.nfoservers.com/order-virtual-dedicated-server.phpIts a bit spendy, but the processor is top knotch quality (Couldent tell you exactly what it is, but when I looked it up its price on newegg was $1800.
Using that package I ran 2 Garrys Mod Servers, 1 Tf2 Servers, and 2 Minecraft Servers with top knotch performance on all of them (None of the 10 cores reaching over 80% usage).
Right now the price of that package might not be feasable for you guys however, but if you are looking into expanding in the near future, I would definently check them out.
I presumed it was just the client that was not Linux Compatible, I was not aware the dedicated server was not linux compatible (Guess thats another reason my community should not look into the ns2 route).
Yeah, @ $50 a month, a Ns2 server dosent sound very appealing, since custom cotent/sup perks aren't very viable in ns2.