I have started to use Freeview on my new plasma screen, and the image quality is acceptable, although it does seem prone to breaking up/freezing fairly often. I am going to upgrade the aerial/box in due course which should improve things. Is it worth upgrading the coax cable from the wall to the STB to get better PQ? I am using a standard one, and I have seen some advertised for about £8-£10. Are these likely to make any difference?