On the Zinfandel line of thought, also try the Ravenswood Zinfandel - it retails for about $10 and is a nice smooth wine to have on hand, especially at the holidays. I usually have this around at Thanksgiving because it's not too expensive (10 people coming for Thanksgiving this year) and pairs nicely with turkey.
If you feeling splurge-like, try the Duckhorn Vineyards Paraduxx. It's a Cabernet blend that retails for about $50, but it is like velvet.
For Pinot Grigio, Santa Margarita is lovely. Retails for about $25. The Mezzacorona is about $10-$15 and does nicely. Most Pinot Grigios are pretty smooth and easy to drink in general.
And I'm not usually a big C-onnay fan, but I do love the Sonoma Cuterer Les Pierres. Another one I only get once in a while due to price, but it's very nice.
Not sure if they have a Best Cellars store where you live. It's a wine store at which every bottle is under $15 or so. And they have some really fantastic wines -- all divided by flavor so it's easy to choose one. Lots of fun.
ETA: Oops! I didn't see Love4Cheno's full post on the Ravenswood rec before I posted a similar rec. See, now you know it's a good coice - two recommendations. :)
Updated On: 11/7/07 at 01:12 PM