I just purchased a Slingbox 500. My wireless/router is a B/G. How can I test or understand the upload speeds that the 500 is doing (I know it supports N). I have 5mb+ up from other devices in my house... laptops/iphone/ipad, etc.. My son tells me the quality on his end from Airplay/iphone to his TV is pretty bad. I believe my upload and his download are very sufficient from Speedtests we have run. Trying to determine if upgrading my wireless/router will really have a positive effect.