The King Keg Pressure Barrel is well made and will serve you well (as well as serving your beer well!). They have a 4" cap which allows for easy cleaning inside. It holds 40 pints of beer  and comes with a choice of a top tap or a bottom tap.  The top tap version has a float system which draws from the top of the beer so you can draw clear beer off as it clears down. With the bottom tap you need to wait while the beer clears all the way down. However, by waiting you will have a matured beer and the top tap version will use more co2 gas as it needs to push gas up to the tap as you use the beer up. So its a matter of personal preference which type you go for.  There is also a choice between either a S30 valve (for the larger S30 co2 cylinders) and a pin valve (for the 8g bulbs). Please make sure you select which you need as the two types of gas containers are not interchangable.  We do sell each valve seperately so you can swap to the other gas method at a later time if you need to.