Small network

Hi guys,

I've a question about both a setup and the hardware it would require. So I have two computers at home. Both have wireless capabilities, both have Gigabit ethernet controllers(actually one of them has two). They are connected to a small network that has a DHCP server that also logs/detects the MAC addresses of the network cards. That network is independent and has multiple concurrent providers of internet connectivity, most of them offering PPPoE connection. Thus I have two separate internet accounts with two static IPs.

My goal: to have a device, that would provide wireless/wired internet to both computers from both internet accounts and also provide wireless interconnection. That device also needs to provide Gigabit wired connection between the computers and further connect the PCs to the network outside. I also need the device to allow MAC masking so that there will be no mac collision/detection when I access the internal network via the wireless access.

So what kind of hardware do I need for that and additionally is there any recommended software for the purpose?