The Shuguang WEKT88 Plus is my favorite KT88 tube. In my Jolida Fusion 3502S a quad of these -once properly burned in for about 50 hours- sound absolutely great, with super tight, deep bass, soaring highs, and an airy, 3-D, almost "dreamy" quality to the sound that is second to none. Very accurate, and in this amp it sounds best (IMHO) with neutral pre and driver tubes: currently a pair of TFK ECC83s smooth plates plus the (cheap but fantastic) RFT ECC81s round getter are doing a great job...