I think it does a good a job of counter balancing the bright Grado sound (depending on the tubes). I was really happy with my LDI+. It did me good for 2 years.
Are you looking for more bass or depth? If so than the LDI+ is a good bet.
If you're looking to highlight the Grado signature rather than tame or counter it, then you might want to look elsewhere.
At least that's how I felt in my experience.