There are so many manufacturers from all around the globe.....The U.S., France (Look, Vitus), Italy(Colnago, Ciocc, DeBernardi, Casati, Cinelli, etc. etc.) , Japan (Nishiki, Panasonic, Fuji, etc.) , Switzerland (BMC), Taiwan. Many of the "Top" manufacturers from these countries put out an excellent product. Once must establish a criteria on how one defines "TOP" In other words, are you looking at frame construction, componentry, or style? I prefer to look at the quality products from smaller manufacturers. My personal favorite is BMC, a smaller Swiss bike company who makes a high-quality product. Although they are not too well-known, their products exemplify Swiss know-how and precision. Their products are exquisite and well-crafted. Their website is
www.bmc-racing.com .
Hope you find what you're looking for.
RL