Power conditioner and high end power cord

I am setting up my first system and need to understand if you have a good power conditioner (EQUI=CORE 1800) do you still need these high end AC power cables. The cable I got with the conditioner 6 feet looks very high end not sure how it's made. I have all my components (two -MC601mono blocks, C2600, MD550, MT10, two JL Audio E112 sub, and JL Audio CR-1) going into the EQUI=CORE 1800. If you switch all the components to a higher end AC cables is the sound any better. Or 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. Any help would be appreciated. 

@lak ,
+1, as usual.
This is something you are going to have to try yourself.
If I were you, I would start with no conditioning and just plug everything into the wall or power strip.
Listen for at least a couple of weeks.
Then add a conditioner to one component and listen.
Then add a 'better' power cable and listen'
or as they say:
Rinse and repeat.

The amps plugging into the 1800 may lessen some of the dynamics from the sound.  If this happens, try plugging those into an outlet rather than the 1800.  I've never liked the amp sound with a power conditioner because of that.  I do have 2 Core Power 150s.  One has the preamp going to it alone and it to on outlet.  The other has all my front end stuff plugged into a Synergistic Research QLS-6 power strip and it plugs into the CPT-150 which is then plugged into an outlet.  All my power cables are high end.  If you want to try your amps without plugging into the 1800, you will need 2 identical length power cables from the same maker.  I have 2 sets of WyWires Juice II PCs that I was using with my mono amps, but bought a pair of LessLoss Reference PCs this week that sound much better in all ways.

I will not be using the WyWires cables any longer if you're interested.  They are in the reasonably priced category for power cords.  The LLR are in the upper category price wise.  They are the same length and would give you a very good idea if putting your amps separate from the 1800 is good or a waste of time.  They were the equal of LessLoss Original PCs that I had at the time.  LL cords have been very well reviewed and are thought highly of at their price point.  Let me know if this interests you.

Every time i have upgrade a power cord the sound got better +1 Lak
Power cords have improved my system.....so too upgraded wall plugs, but not power conditioners.
@dorkwad +1,
I forgot to add-
All my amps go directly to the wall. Power conditioners often have less than positive effects on high demand equipment like amps. In this case use a better power cord.
@ stringreen +1,
Improved outlets (hospital grade) and a dedicated line, if possible, will give significant results.