I've read somewhere here that older WT-800's had problems with noise, a different (and worse) compressor, and that newer models don't have these problems. I'm going to use the DI for alot of recording, so I want to have as clean a signal as possible. If I'm thinking about getting a used WT-800, at least what year should it be? Would a 98 be too early? And if it does end up being noisy, do I have a way of fixing it?