Those are both hotly contested mods here. Some people say they're not worth the money, and do nothing at all. I'm sure some of them will chime in here. Others, mostly those who have installed the mods you've mentioned, say the 3.0 benefits from these mods, and are very happy with the results.
I installed my pullies and e-fan at the same time, and felt a difference, but it wasn't earth changing, just a noticeable increase in revability, and it seemed to pull harder. Engine compartment was much quieter as an added bonus.
If you do a little searching here, you'll find plenty of threads, where both sides of the argument are discussed. I'd suggest you read them, and form your own opinion.