It really depends on whether you can get a fill to 3450 or not. If not, then get a steel LP 105. If so, either get a smaller tank that at HP will hold the equivalent, or you can now get Faber steel tanks in the U.S. that are 3450 psi that hold 148 cubic feet.

Joel here is one of the largest Faber dealers anywhere, so I bet he could spark you up good with a Faber LP or HP tank.