I need to get a usb adaptor for a new wireles router which will be approx 10 metres from the pc.. The internet speed on my broadband is 6.5mbps & the adators seem to be available in 150mbps or 300mbps, with the faster ones being a lot more expensive. Given my download speed is there any point in buying the faster one & are there any other aspects of the spec of them that I need to consider eg do they have different ranges, reliability etc.? Thanks