I've had an Everlast for many years and it sure has taken a beating and is in fine shape. I've heard that Outslayer is supposed to be the best but I'll stick with my Everlast.
I am using an RDX Punching bag. Got free delivery in Australia with a stand as well.
This one is more comfortable and durable than others. I got that in huge discount. You may also look for the deals they have the whole year.
This punch bag i bought because it is used by the legend mma fighter Randy Couture. Just initially bought because of randy but after found it better in quality than much higher brand names.
to buy best punching bag ..you can also visit to this site :http://rdxsports.co.uk/boxing-gb/punch-bags