This is an impossible question to answer because who defines what is best? Why do youwant it? If it is for you to drink, then its a wine you'd like - so what types of wine do you like? If its for a present and you want to impress, then steer clear of brands and get something obscure, thus the recipient is not so likely to know its cost.
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Some suggestions.South Africa and Australia make good wines at good prices , look for these from Tesco
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Goats do Roam - about �5, excellent value matching Rhone wines at twice the price
- Beyersklood Synergy - complex impressive blend for about �8
- Diemersfontein Cape Diem Pinotage - stunning example of the variety for a tenner, winner of almost every tasting it's entered. Tesco bought the entire vintage at a good price which the winery regretted after the wine started winning all the plaudits.
- St Hallett Faith Shiraz - a bargain at �6 from a leadind Oz exponent of this variety