I have flatwound strings on my fretless bass right now, and I don't get the same power I get from roundwounds. I want to get new strings that have that same punching sound as roundwounds but still have the sliding capability and smoothness as flatwounds. Ground wounds and Tape Wound Strings came up, and I can not decide for the life of me. I play thrash/death metal and I need a set of strings I can use for a long time and get the best tone from.