I would suggest going to the websites of the major brands and see what they offer. Do a google search to find the manufacturers website.....Babylock, Bernina, Janome, Viking, Singer, etc. Nearly all of them list their machines, the features of that machine, the costs, where you can find a dealer, etc. They also generally have a way to compare the machines. Or go to the websites of the machines that are available from dealers near you. I suggest doing this before you go to a dealer so you are better prepared to try out the machine you are interested in.
Welcome to the board but your question is extremely broad and difficult to answer without more information,as Schill93 has kindly pointed out.
Good luck in your search......I think you may be awestruck at the machines available in the market today! Your pocketbook may be shocked as well!