I changed up from a standard 2 " blade, to a 2-1/2" tipped blade, I was told that the wider blade was less prone to cracking around the bottom of the gullets, so far this has been true.
My band mill uses car tyre wheels with the blade position/level that is slightly lower than the bottom of the wheels themselves, so I don't need to have the blade as tight as normal bandsaws.
I got my blades direct from the manufacturer here in the UK, the company is called Bennetts, see here
http://www.ernestbennett.co.uk/superhpg.htm.
Most of their products goes to the USA, at the moment there are very few companies in the States making these types of blades, but, Bennetts have said they know of the company Simmonds, who actually make these blades and the machinery to sharpen them, so there must be an outlet in the USA where one could get some.
Now I have been running the tipped blades for a while, they really come into their own when cutting wider boards of up to and over 24".
The long term running costs of the tipped blades is actualy cheaper than a standard blade, and running time between changes has more than trebled, in the UK most if not all of the Woodmiser operataors have changed over to these blades.
Now I have the tipped blades I will never go back to the standard blade.