·exede by ViaSat
All Hughesnet plans have data caps. Even the business plans. The business plans start with a plan equal to the top residential plan which I am assuming is the one you are talking about which is 400 MB and go up from there. there is one that has a bit over 1GB I think but it is like $600 a month I believe. As things stand right now you will not find a satellite connection without a limit that I am aware of. As for lag, that is not any satellite providers fault. They are sending a radio signal thousands of miles up and back and those radio waves only travel so fast so you have inherant latency with satellite that cannot be overcome.
HughesNet elite plan/.74 dish w/1watt trans. / 9000 modem / 3 computers on a linksy's wired network