Glad you had a good time in Paso, one of the best places to taste wine. I've been there a few times and liked it so much that I joined the wine club at both Justin and Tablas Creek.
For more moderately priced wines I don't think you can do better than Four Vines. The Mrs and I particularly love their Naked Zinfandel. Next to Justin is Carmody-McKnight, who are not very well known but make some really great wines. For those of us in our 50's or older you might recognize Gary Carmody from the TV show Land of the Giants (although I think his screen name was Gary Conway). The McKnight half of the partnership is his wife, a former Miss America.
The most beautiful winery in this area I've visited is without doubt Calcarious Vineyards. They are located on top of a mountain off Peachy Canyon and the views are simply spectacular. Their "Twisted Sister" meritage is fantastic too.