Hi. We are having a party for 30 people in a 9m x 9m marquee. Half the room will be filled by a large table and the other half will be used for music and drinking. We have a home made jukebox for the audio source (pc with 3.5mm output). I need speakers and amp. Ideally the music is louder enough to dance to on one side of the tent, but people can still chat at the table in the other side. I have very little knowledge of AV systems. So any suggestion on what size and models of speakers and amp I need. (After the party, I would quite like the system to live in my office as my music system, (4.5m x4.5m).) Also I'm on a bit of a budget, ideally under £300. Any help would be great.