Wireless Controllers

Hey.

I have a Wireless Logitech Rumble Pad 2 but want to buy another device for some 2-player games like PES. Thing is, I've got a logitech thingy flashing a light here and I'm wondering if having a Xbox wireless receiver anywhere next to this one is going to result in conflicts. I suppose I could put them about 1m apart, but isn't this going to cause bad performance, being the same radio frequency and all? What do you think?

Thank you