Here are some quick recommendations:
Speir is a South African Winery they make a wonderful and affordable Sauvignon Blanc. There Cabernet Sauvignon is also nice, but the Blanc is suprisingly excellent - especially for summer months.
16 Hands Cabernet, another South African wine, has a good flavor, a bit plumby for my tastes, but everyone else really liked it.
Have a wonderful weekend,