If you had to decide between those 3, then I'd definately go for the LGI... However, you have to get in contact with Charlie (Mr Bulk) for availability or snatch it off of someone else.
If you're deciding between the 2 reactors, get the 3AA Reactor III. It takes the mild sting of LiAAs out of the picture.
Another one to consider that's right at those price ranges and performs just as well as the LGI, are the MadMax/BadBoy drop-ins from Wayne (dat2zip)...