Maximum speed is really expensive: the two test winners from Sandisk's Extreme Pro series with the new UHS-II technology cost at least 200 euros. The test winners with UHS-I technology are much cheaper. Here you can get really fast cards for just under 50 euros: Samsung microSD Pro Plus 64 GB and Lexar Pro SD 128 GB...
SanDisk Ultra U1
128 GB, SDXC, U1, UHS-IProduct details
With SanDisk Ultra UHS-I memory cards, you can take better photos and videos in Full HD with your entry-level to mid-range compact camera or camcorder. Enjoy faster downloads, large capacity, and improved performance for capturing and storing high-quality photos and videos ranging from 16 GB to 128 GB in Full HD. With ultra-fast transfer speeds of up to 80 MB/s, you will spend less time transferring photos and videos from the memory card to your computer. SanDisk Ultra UHS-I memory cards are waterproof, temperature-resistant, X-ray proof, shockproof, and compatible with SDHC and SDXC digital devices.