This is really a sweet little kit, I've put mine together over the last year: [linked product missing or disabled: IF145-072]
Choice of tools is kind a matter of how deep your pockets are and just how professional you want get. For most repairs the 54 piece set is excellent: [linked product missing or disabled: IF145-022]
The $300 Professional set is something I'd like to get: [linked product missing or disabled: IF145-114]
I really like the 26 bit driver set because of the larger diameter driver (it allows for much more torque). [linked product missing or disabled: IF145-028] All these are magnetized when using the drivers. I'm sure iFixit could put together exactly what you need if you tell them exactly what you intend to work on and how much you have to spend on tools. Even an excellent box to keep them in: [linked product missing or disabled: IF145-129]