There have been many good suggestions for you. I would also add that you may want to join the yahoo group - homequiltingsystems It is a super group with tons of information. I have learned so much from them. There are lots of files to read with comparisons of many frames.
Don't be in a hurry. Read everything you can find. Decide what you need and don't need
There are places on the net to look at used systems also. Go to big shows and do some serious test driving.
Happy Thanksgiving to all.