Get the best Microphones you can afford ! SM58's work well for us , good sound , robust and minimum feedback , And Stands for speakers - You can 'fill' a room with sound without using a lot of volume if the speakers are over peoples heads ! I am currently using a Soundmaster with FOUR speakers - Ideal for getting sound all round a large room .
Bear in mind that you gets awhat you pays for - Cut Price gear gives Cut Price sound !