Dedicated 20 amp lines/should i use a sub panel

Just curious, why do you say not to use a sub panel. as far as my outlets i'm using Furutech GTX outlets. 

I will be running 3 lines all identical in length to avoid ground loop hum, my interest is will there be any difference... negative or positive...from running a sub panel as opposed to just using open spots in the 200 amp panel. the closest and farthest line will each power a REL G1 sub and the centre line will power a Synergistic Research powercell 10 UEF, which is where my  tube cd, tube pre and ss amp are plugged into. this is how my system is presently powered just not with dedicated lines.

Thanks dill, makes sense as not to add any extra contact points. i had just thought that by adding the sub panel the 3 dedicated lines would be better isolated from the rest of the houses electrical devices.

Thanks everyone, i appreciate the info. i guess ill forget about the sub panel as it seems like there is little to no benefit by adding it since the 3 runs will all be under 50 feet and i'm not going with an Equi=Tech as much as i would love too.

noromance,
No apology necessary, i'm enjoying all the different opinion's and just absorbing all the info.