There is something to be said for thinking about lifetime use when it comes to buying a kitchen tool.So here are five kitchen splurges that are a major expenditure but are probably worth the investment. .Kitchenaid 8-quart Commercial Stand Mixer, $999 at amazon.com.Ooni Fyra, $250 at ooni.com.Coravin Model Eleven Wine Preservation System,$560 at amazon.com.Breville Barista Touch, $900 at amazon.com.Thermomix TM6, $1,499 at thermomix.com