The best grapes are ther free ones, so guess your asking for second best. I love Italian Wines absd California Cab Sauvs. If you like bold red, go Cab Sav, cant go wrong. Don't buy a cheap kit unless you want watery, a little sweet red wine, AKA Boone's Farm. In reality best is a personal taste thing. If you like sweet to semi sweet white, Riesling is a good pick. In kit form it usually come with an Fpac and you can ask us if you buy one of these kits how to asjust sweetness. Good luck and welcome to our obsession