[g.l.amour]

i once had the same Q in mind, were u to wonder, it is not necessary for your res to be in the highest spot. since there are no leaks (i hope for you ;-) ) there is noplace for air to enter the lines and push all the higher water out of your res.

as blackeagle states, the shorter lines will work magic for your flow, but what i think is important is that your setup will look more clean...