i wouldn't really recommend a kingman tank.. if you read several reviews on them you will find out that kingman support sucks and that the number of shots from your java tank won't be as high as other tanks. In my opinion, kingman would be the butt of all tanks..
I'd say just get a Crossfire, Nitroduck, or PMI they're only about $10 or $20 more than a Java and the quality/support is much more better. Also, their gauges are well known for being extremely accurate on their air systems.