Personally, I'd recommend either geothermal generators (if you're more strapped for supplies), GT thermal generators (that extra 4 EU/t makes a definite difference), or if you're feeling...adventurous, you could strap up a tree farm and use a mixture of Power Converters, Applied Energistics, Factorization, and whatever mod of your choice to make the tree farm with. Then, just burn the wood using a bank of furnaces that are being heated with Factorization furnace heaters, which you can either power thru Factorization solar turbines or, if you want something that doesn't depend on the time of day, strap in a energy-to-charge converter setup to a battery block or two, and run some lead wire to your furnace heaters.
After that, using AE and some kinda storage (I recommend either AE chests or barrels) for the saplings and apples, turn the wood into charcoal, and use that charcoal to fuel a bank of regular old IC2 generators. Renewable, endless power that's very extensible and if I remember correctly, uses little energy in the process to fuel the whole setup.
Though, for your energy needs, you'd need 103 regular generators...but, novelty!
