If you are looking for the best of the best then check out the HK Army AeroLite Paintball tanks. These bottles are available in either a small 48ci tank or the more common 68ci size. The AeroLite tanks are available in a variety of colors you you can keep your full setup matching and on point.
There are two different regulators available for the HK Army Aerolite Tanks. The standard regulator bottles which start at $144.95 and the AeroLite Pro tanks which come with the fully rebuildable and adjustable regulator($204.95).