If you have PS, and don't mind a bit of post processing, download a trail of Nik DFine NR2 and try it out. It does a great job of reducing grain while keeping details. it doe snot completely remove it as other software do and make things look plasticky...
If you want more radical elimination, then download a trial of Topaz denoise... and give that a shot.
I used ot use LR NR which was better than standard PS NR, but after owning Nik/Topaz, I rarely use LR.
Hope this helps!