There are many different track systems available and it is really a personal selection. If you search around here there have been many discussions on the different track types. Hopefully you have a local hobby shop or train store, and if so I would highly recommend you go there and start looking at all their track. There is a book titled 'Trackwork For Toy Trains' by Peter H. Riddle, Kalmbach Books, that helped me a lot with the available track types and helped me with my decision to use Atlas-O track. Looking at the track at my LHS was a great help also.
It's an age old debate of which track is the best, you will get more answers than there are track types. Every track system available today is a good system. They all have pros and cons. The best thing you can do is find the one that meets your needs and that you like the look and feel of and go with that system. You will be a lot happier and probably won't be wanting to switch to another system any time soon.
