You say you don't care for sweet, yet
German Rieslings???

I've had perhaps one that didn't curl my toes (in a sickly sweet bad way), but in general I avoid them. I suppose if you are going drier white they'd be palatable, but I have not found many old world wines that I cared to casually drink (whether for taste or for price). I do have to nod at your hysterically expensive Barbarescos (working as a hostess in fancy french restaurant I had the good fortune to taste them), and am curious if you care for any California wines. I went to Napa and Solvang previously on wine tasting forays and enjoyed some of what I had muchly.
The Germans have a pathological need to classify everything. Among German Rieslings that qualify for the Prädikatswein designation (highest category):
From relatively dry to extremely sweet:
Kabinett
Spätlese
Auslese
Beerenauslese
(Eiswein)
Trockenbeerenauslese
Eiswein (ice wine) is produced through a distinct process, but they are generally about as sweet as Beerenausleses. There are additional trocken (dry) and halbtrocken (half-dry) modifiers to confuse you further, even though the Prädikats are already based on must density (i.e. grape ripeness and sugar content), and further "special" classifcations, including Goldkapsels, multiple stars, and an obtuse vat system, can indicate extra ripeness.
But yes, there are completely bone-dry German Rieslings. The very best of them (Grosses Gewächs/Erstes Gewächs) are the equal of the best white Burgundies from the top producers in the Côte de Beaune. Just like any other wine, the producer is the most important variable. Look for Dönnhoff, J.J. Prum, Weingut Keller (among others) for the really good stuff.
As for Californian wine, there's plenty that I like. Napa is especially strong for Cabernet Sauvignon (whether as 100% or as a Bordeaux-style blend). On the other hand, Pinot Noir and Chardonnay are tricky, as you'll have to pick specific regions (e.g. Russian River Valley, Anderson Valley, Sonoma Coast etc.) and producers (Rhys, Arcadian, Copain etc.). More obscure grapes tend to fare less well.