I need help on what's the best A.V created these days...2009...

I'm currently using NOD32 by ESET...But I'm not sure of it... i want an A.V that doesn't slow my "internet" and will not slow down my computer...I've used NOD32 and there's no problem with it.. easy to use,fast update and doesn't slow my internet or even my computer... i just wanna know if there's something better than that...for 3 months I've used AVG 8.5,i can say it's not that good,it slowed down my computer...and it has a poor scanning engine.. so i switched to nod32...did i made the right step?