EMC is supposed to be much easier to set up these days. I've burned a disk and looked at it for a few minutes, but that's it.
TurboCNC is pretty easy to set up, and easy to use. You don't need win98, just plain DOS, which should run on any PC. Few people use it on routers these days, mainly due to the lack of a Constant Velocity mode. It's apparently being worked on, and may appear in the near future.
Which brings you to Mach3. IMO it's just as easy to set up as TurboCNC, if you know what you need to do. It's a good idea to watch the setup videos at www.machsupport.com They should make the setup pretty painless and straightforward.
Also, you don't have to pay the license fee to set up and run your machine. Mach3 is free to run up to 500 lines of g-code. So feel free to try it, and if you find it to difficult, move on to something else without spending anything more thanthe time your willing to spend. good luck.