After tasting more than 300 affordable American wines, Senior Editor Ray Isle reports on his most exciting white wine finds.Additional research by Megan Krigbaum

2006 Chateau Ste. Michelle Dry Riesling ($12)

This is definitely one of the great wine bargains in the world. Lime-zest aromas, lively acidity, intense fruit—if you want to know why Riesling inspires such devotion, this is a great introduction to the grape. And starting with the 2006, Chateau Ste. Michelle sells this wine nationwide, instead of just in the northwest.

2005 Ca’ del Solo Big House White ($10)

A blend of Viognier and other white grapes from all over California’s wine regions, this crisp wine has floral notes and an appealing fruitiness.

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2006 Dry Creek Vineyard Dry Chenin Blanc ($12)

Most of Dry Creek Vineyard’s wines sell for well over $20, but this rich, melony, full-bodied white, made without a trace of oak aging, is a welcome exception.

2006 Folie à Deux Ménage à Trois White ($12)

This easy-drinking blend of Chardonnay, Muscat and Chenin Blanc is aged in stainless steel tanks to keep its ripe, tropical flavors bright.

2006 Willamette Valley Vineyards Pinot Gris ($15)

It’s rare to find this much depth of flavor in a wine under $20. Pear and melon fruit, light floral notes and firm acidity all combine to make this Oregon white one of the best deals around, especially in a great vintage like 2006. Plus, it’s from a winery that’s dedicated to eco-friendly sustainable agriculture.

2006 Konstantin Frank/Vinifera Cellars Salmon Run Riesling ($13)

From one of the top producers in New York state’s Finger Lakes wine region—itself one of the best regions for Riesling in the United States—this pear-inflected, vibrant white wine makes a great partner for seafood of any kind.

2006 Paraiso Monterey County Riesling ($14)

Paraiso’s vineyards lie on the windswept slopes of California’s Santa Lucia Highlands, inland from Monterey. The region’s cool ocean-influenced climate is one reason why this dry, nectarine-scented Riesling is so refreshing.