I was loaned a DBX 166XL for a while and loved it, but then had to give it back. It occupied a 1U rack space, and I am debating on filling that space with another 166XL or getting a 160A instead. One of the things I loved about the 166XL is that it boosts the sustain. Does the 160A do that as well? Any other recommendations on rack mount compressors that add sustain? I only use 1 channel, going into an SWR STudio 220, and for a thick rock sound.