Baked Pasta
Well, if you're talking about Lasagna, then you don't have to boil the pasta before baking, just layer it dry. Most brands allow you to do this, you just have to read the label on the box.
To make a really good Mac 'n Cheese, I like to use Penne or Ziti pasta. They're thicken than macaroni, and they hold up to baking a lot better. Just make sure you cook the pasta to pre-al dente. Usually Penne takes about 8 minutes for al dente so cook it for about 6 minutes instead. In my opinion, the best Mac 'n cheese uses a bechamel mixed with cheese. You'd want to use a decent to good brand of cheese like a Tilamook Orange or White Cheddar, and you can even use something like a Gorgonzola or Marscapone cheese for a different kind of flavor. At this Italian restaurant I used to work at, we had a dish called Risotto alla Quaggi Formaggi (Four Cheese Risotto). The cheeses were Parmesan, Marscapone, Gorgonzola, and Bochetto al Tartufo (a Truffled Sheep's Milk Cheese). I've never tried that combo to make a baked pasta dish, but I'll bet it would be really good.
I tend to stay away from baked pastas, only because they're somewhat limited because they murder fresh ingredients like arugula, rocket, broccoli di rape, etc. However, if you're really interested in baked pasta, then my favorite to use is Gnocchi. Baked Gnocchi in a Bolognese Ragu and Browned Parmesan Cheese on top is unbelievable.