The Pedro Ximenez is very sweet in the manner of a dessert wine. Eiswein is in general difficult to find due to it being both rare (due to how it's made) and inevitably expensive. Something like a half-bottle of German or Austrian eiswein will be at least £30 in the UK.
German trockenbeerenauslese aka TBA is my preferred dessert wine, but it's very expensive, so I usually opt for the much cheaper Aussie ones, some of which are very good.
Until the 1990s very few wine lovers outside Austria had even heard of Grüner Veltliner. Today, no self-respecting restaurant wine list, whether in New York or Hong Kong, can afford to be without at least one example of this, Austria's signature white wine grape. I would submit that this is...
I toured three wineries on my recent trip to Waiheke Island in New Zealand. It was interesting that one vineyard would grow so many varieties of grape. Mudbrick for example has Syrah, Cabernet Sauvignon, Malbec, Petit Verdot, Merlot, Tempranillo, and Cabernet Franc for its reds, and Chardonnay, Pinot Gris, and Viognier for white.