Power Delivery is one of the most Important and undervalued Components in your system.
The more Power you get to your system the better it will perform.
Better Imaging, Sound Stage, Detail etc.
Ideally one should look to invest 25-30% of their overall budget on Power delivery. There are ways around that figure if you are willing to do some homework, have patience and purchase through a used market.
"If you switch all the components to a higher end AC cables is the sound any better" YES
"do you need just a high end power cord from the wall to the conditioner
and use the cables to the components that they came with"
If you are on a Budget, as most people are, the best place to begin investing is in the Power Chord / AC Cable from the Wall to the Conditioner. Then just begin to switch out PC as you have the budget for them.
IMHO the next Power Chord / AC Cable to invest in would be from the Conditioner to:
MCD Source/ CDP
C2600 pre amp
JL C-1
MC60 Monoblocks
JL Subs
If you listen to a a lot of Vinyl and have invested in new cartilage then you probably want to get a good PC for your turntable around the same time as your CDP. If not let that be another project when you are ready.
The Cable Company is a good resource as they will allow you to audition cables from their library for a membership
https://www.thecableco.com/
Cable Companies to check out $$$$$ - $$$
http://www.stage3concepts.com/
http://www.highfidelitycables.com/products/power/ct1u/
http://www.hb-cable-design.com/1_english/horizonnk.html
http://www.oyaide.com/ENGLISH/AUDIO/products_category/power_cord/pg631.html
https://www.analysis-plus.com/product/home-audio/power-cables/power-oval-2/
There are many others, take your time and enjoy!