Any Thoughts on Air Compressor

I have a 6 hp blackjack with a 60 gal tank. I have had it 11 0r 12 years. When it was new worked real well and recovered fast when using air tools. Over the years it struggles to keep up with demands. I ordered new valve plate and gaskets but didn't help so I guess the rings are shot. Trying to decide what next move should be? Replace with an IR 2 stage from Tractor Supply for $1100.00 or just replace the pump on mine with a 2 stage like this one from Eaton on Ebay.http://www.ebay.com/itm/Brand-New-Ea...item2c73cc130e Any thoughts about a good choice??? :-?