If you like the look of Week's over-dyed thread, but you want to stick with DMC, you might check out either DMC's variegated thread [#115 would work], or try DMC's Variations line; from what I've seen, it has a more subtle variegation.
A word about the variegated thread: the variegation is very regular, and it repeats in a specific number of inches [sorry, don't remember how many...] To use it most effectively, find the repeat, and then cut all your thread lengths the same