Are USB dongles effective when using heavy software?
No dont bother with broad band dongles. If your want internet in the UK, get either tiscali ADSL (through a phone line) or virgin (fiber optics if possible) Tiscali is about £15 a month for up-to 8MBps i dont know how much virgin is any more, but fiber-optics is up to 20MBps i doubt you will get 7.2MBps on a dongle, unless you are sitting on the satellite. and for imaging 15GB wont do.