With summer in full force, you may be looking for lightweight suits. Aside from the Wolfen white suit, your choices are mostly going to depend on your knowledge of the fabrics involved.
In that vein, allow us to repeat a bit of wisdom from A Suitable Wardrobe. Instead of putting stock in the weight of a fabric, you might do better paying attention to the weave. Woven properly, even heavy cloth can be allowed to breathe. Summer fabrics are likely to have “fresco” in the name, or something similarly breezy-sounding, and they can be made heavy enough to avoid too much flapping.
Savile Row is rightly known as the world center of tailoring, but too often the attention falls on the expert cuts—which you can get a good-enough approximation of in Hong Kong or New York—rather than the heirloom fabrics that usually don’t travel farther than one shop.