You must give it time to break in. But in all honesty, unless you were looking to have a more analytical sound the move from tubes to solid state was probably not a good move. Also, in terms of sound quality (without regard to the sound family) I always increase the cost by 2x or it is likely to be lateral.
I would recommend finding a used Audio Research Reference 3 phonostage. I think this would be a significant upgrade on all respects.