Maybe try a Neuance iso/absord shelf under the transport. Does wonders for tightening the upper harminic presentation so that the brightness isn't prominent because it's more coherent. Swimmier suspensions like air cushions or pds might make it worse due to smearing effects. Check out sidewall first reflections, toe-in, as well. If necessary get a Cardas or MIT. As a last resort lose the cheap DVD and get a nice cheap NAD C541i for $500 and get on with it.
Good luck.
Good luck.