honestly im so fed up with my current cards because my r6 ii just keeps locking up during bursts and its driving me crazy. I was out at a wedding shoot in Brighton today and missed the freaking kiss because the buffer took like ten seconds to clear on these cheap SanDisk cards I bought. Im so anxious about my next gig on Saturday and I really need to upgrade like right now. I have about 200 quid to spend and I need the absolute fastest thing that wont fail on me mid-shoot. Which SD cards actually offer the best performance for the r6 ii and wont leave me hanging during high speed shooting?