if you arent going to upgrade your engine mounts at the same time, just stick with a stock one, otherwise change all 3. poly will transmit alot of vibration, nismo mounts will transfer less then poly but are more expensive
I changed the lot for apex street mounts very happy with them, easy enough to fit and made a big difference to my shift. Get slight vibration at idle but that's it really
Nismo mounts are fantastic but I got a replica from db-power iirc. The apex versions are meant to be really good also. Don't solid mount it as it's horrid!