Log... http://pastebin.com/mBmuwpUS    Also to note I just found this appeared in my libs folder? bcprov-jdk15on-147.jar what is it? 
  
at net.minecraftforge.client.ForgeHooksClient.renderInventoryItem(ForgeHooksClient.java:310)  
  
Also I have updated my libs folder and am running latest forge.  
  
Latest forge "455" and custom mods. all configs should be working together after item/block id re-allocation.  
  
Seems to happen when I go creative mode, and look in the miscellaneous section of items 
  
Modlist is  
  
Optifine (just added, was still crashing like this beforehand) 
Matmos Atmospheric Sound Mod 
Mouse Tweaks 
Inventory Tweaks 
Rei's Minimap 
Not Enough Items 
Gravity Gun 
Portal Gun 
IndustrialCraft 
Nuclear Control IC2 Addon 
Advanced Machines IC2 Addon 
Buildcraft 
ComputerCraft 
MiscPeripherals CC Addon 
CameraCraft 
MoCreatures 
EnderStorage 
Metallurgy Base Metals 
Metallurgy Core 
Metallurgy Utility Ores 
Metallurgy Fantasy Metaks 
Metallurgy Ender Metals 
Metallurgy Nether Metals 
Metallurgy Mystcraft Addon 
Multi Crafting Table 
OmniTools + Forge Lexicon 
Mystcraft 
Thaumcraft 
Factorization 
Forestry 
Balkons Weapon Mod 
Twightlight Forest 
Thermal Expansion 
Secret Rooms 
ICBM 
Basic Components 
  
Any help is greatly appreciated.