network connection ps3 and laptops

can some one tell me what would be the best dsl modem and router or combo to use with a ps3 and 3 laptops. Right now i have netgear 824v3 router and a at&t motorola modem i have it bridged so i can get open nat type for my ps3. my internet speed is Download Speeds Up to 6.0 Mbps Upload Speeds Up to 768 Kbps but when i try to play ps3 wired in i get great connection then poor connection and on laptops its fast and then slow all the sudden then fast again then slow again. we had no problems then just all the sudden it does this