I've always been able to save money by buying the components separately on eBay.
My preference has been JT sprockets and EK chains.
JT Sprockets are:
Front: JTF520.15 - rumor has it they're now making one with a rubber damper like the stock one has. Maybe someone can chime in.
EK Chain is:
EK 525SRX2, from which you'll need to remove a link or two.
If you don't have what you need to need to rivet the new chain, you can get a screw-type masterlink for the EK. Otherwise there are plenty of other good choices from various manufacturers.