It's a huge investment. I would go to a major show and look at all the options out there. You can compare them, find out what works best for YOU and check on what type of support you will receive after purchase.
If you are not hands on with computerized equipment, I would suggest purchasing a complete package. This way you know that everything works together (remember the frame is also involved). While it is certainly possible to acquire the items individually, if something doesn't work, you can't be 100% sure what it is and technical support from one component may just point fingers and say it's not their problem.