Lots of good choices in the previous posts. Nothing wrong with being budget-minded, and here's a few that I've had recently that should fit your bill for smooth, surprisingly complex wines:
- 2010 Leese-Fitch Cabernet Sauvignon - $10-15 retail just about anywhere; drinks more like a $40+ cab.
2010 Bridlewood Blend 175 - $14-17 retail, cab-based blend from the Santa Ynez/Central Coast region.
2011 Orin Swift Abstract - $22-27 retail, a Cali take on GSM blends that is really very nice.
None of these should be too hard to find. Keep looking, there are a ton of bargain-priced wines out there that are real pleasers. Just takes patience - and a lot of empirical testing.