Kennylen you never said if your in the UK or Ireland but really the only box worth buying right now is a Kryptview box, if you are in Ireland you already know about the change of encryption from N1 to N2/3 and this box is the ONLY one working on N2 at the moment, if your in the UK have a read what is going on in Ireland as the UK will be next and make up your own mind as which box is the best supported, sent you a pm on where to buy.
Virgin and UPC are 2 completely separate companies, Virgin are unlikely to change to Nagra 3 as they plan introducing an IPTV based system. If you are in the UK, a Eurovox should serve you fine and get you all the channels, as will the Kryptview. If you are in Ireland, a Kryptview will get you all channels - however they may cease working any day as they will not work when UPC fully switch to Nagra 3.