Of course, we all think ours is the best - that's why we chose it! I agree with what others have said in that it depends on the amount of space you have and how comfortable YOU are with the machine. I'd definitely recommend getting one with a stitch regulator, and I love my automatic fabric advance, but the bottom line is that you have to feel that the machine is good for you. You want the handle position to be comfortable (or able to be adjusted to it is) and you don't want the machine to be so heavy you feel like you have to manhandle it to get it to move.
Try to narrow it down to two or three, compare prices, and then spend some more time on each of them. You'll know if it's the right one.
Incidentally, my dealer isn't close by, so I don't get on-site service, but they often can tell what the problem is from the description and by listening to the machine over the phone. Seldom does the machine have to be sent in for service - they're able to talk you through the repair while you're on the phone!