Looks like everybody forgot the OPs desire for fuel economy.
Premium fuel here costs about $2.40 per litre; to put that into perspective, that is $9.08 per US gallon.
He also has a pretty good low gear, 2.92 not 2.2.
Nobody's forgotten anything, genius. Let's say he went with a 3.08 gear like you endorsed. That means he'll have a 1.94 final ratio in OD. He'll be lugging the hell out of that thing and it won't get optimal mileage.