How much are you looking to spend and are you willing to buy used? That info would give us a better sense of what options (besides the AKG and the Neumann) are available to you. I have a pair of AT-4050s that get used as my workhorse LD mics. I also have a pair of Beyer MC834s that I use (although they are cardioid only). I've used the AKG C414B-ULS for instruments and it's a very good mic for that purpose. Not my favorite for vocals (although I don't use the 4050s much for vocals either). The previously mentioned Shure KSM-44, the AT-4050 and 4060 are all decent candidates for general pupose LDs. If you have more money to spend, you can also look at Gefell and Blue (maybe used MT70 or Kiwi).
That said, if you are only choosing between a C414 and the Neumann, I'd take the C414 and then see which model works best for you.