Ok, heres some more input for you. First of all, I won't use your mod pack. However, the reason is not that I am not interested in it, but I created a quite similar one a week ago. In particular, I also removed Computercraft, Factorization, Industrialcraft and its extensions, Redpower, and Portal/Gravity gun and Equivalent Exchange. However, I did include Forestry (thats a must have mod for me) and also some magic mods like twilight forest, mystcraft, ars magica and thaumcraft. Mystcraft mainly because I don't want to destroy my main world with mining, otherwise I could definitely live without it. Twilight forest for exploration, although I haven't really done much there, again I could live without it. Same for ars magica: Its spells looks awesome, but I didn't use it so far. Thaumcraft is another one of my must-have mods, that I would never want to miss, but I think it has a quite restrictive license.