Is a high priced Line Conditioner needed

The bottom line is that your dedicated lines do NOTHING to remove or address spikes, surges, power sags, EFI and RMI riding in from outside your home (although they do reduce interhome interference). In other words, yes, you do NEED additional filtering and protection. I have two power regenerators in my systems and they work quite well to protect the systems and let them sound their best.

I got a Blue Circle PLC 2X Thingee which is a mighty fine power conditioner that runs parallel to the AC and doesn't limit the power one iota. It's built inside a PVC tube to keep the cost down. You can get the version with the fancy metal casing but be prepared to spend a lot more. It has 6 outlets and I have all my components plugged into it (a no-no for sure) and it's better sounding than going straight into the wall.

So, no, you don't have to pay a lot to get a lot.

All the best,
Nonoise

Audience 6TSSD will improve all line big time.

I use PS Audio PPP for tuner, CDP and preamp but not for amplifiers. I find it to be a good thing.

Rsa,

1st stay away from Monster products (so-called conditioners).

2nd consider some kind of line conditioning if you live 'on the grid' as in one of our major U.S. cities.

Let me know the other gear in your system and I will point you in a direction to get started!