I think a mixture of Redpower and Logistics Pipes is the best method. A proper Logistics Pipes sorting system isn't cheap... You need multiple diamonds - I'd say an absolute minimum of 10 if you want to have any efficiency. TONS of iron is required for the various chassis and then the gears used to craft the modules take a couple dozen gold and iron on top of that - not to mention a sugar cane farm to craft all the paper for the blank modules. On the other hand, Redpower isn't too hard, you need a good handful of materials but beyond a few pieces of gold, a few ender pearls, and a diamond or two to craft the handsaw everything is very common (Nikolite, Copper, Tin, and only 1 - 3 iron per machine). Both need a bunch of dyes... Logistics pipe to color the modules and Redpower to paint the pipes but that's easy.
Usually I start off with a simple Redpower Sorting system and slowly upgrade it throughout the game. Upgrading usually just entails adding a second sorter, a couple of extra filters to recolor things coming out of the machines, and maybe a relay or two to act as buffers to stop any clogging of machines. When the time comes when I want AutoCrafting and Requesting, adding a Logistics system is suddenly alot easier and cheaper. Since the actual sorting is already taken care of I just throw a bunch of Provider pipes on the back of my chests, the usual array of AutoCrafting Tables/Crafting Pipes, a Requester pipe somewhere, and a Default Route onto my already existing input chest. From there the two systems are merged.
That being said, I use Logistics exclusively for my Forestry farms, as setting up a bunch of Supplier Pipes is a lot easier than setting up multiple Retriever and Regulators. Unless I'm using Teleport Pipes though (not on servers at the moment, at least not the Bukkit one I'm maintaining) I transfer all the items into Redpower Mag Tubes with a Relay to pipe it back into my main Sorting System at the base.