I need some 15 minute high quality, good sounding cassettes that won't break under repeated takes and rewinding. What brand would you suggest? Also, the tape I was using broke where the leader attaches. I had it repaired with splicing tape but the guy said I should transfer it to a new tape which would require mixing what I have onto CD and dumping that onto a new tape. Is that really necessary? Why would the repaired tape be less reliable than a new one? Thanks.