I have two Singers, one Baby Lock and now two older Berninas. I've sewn garments and home dec for the last 40 years and now quilts for the last few years. I've sewn all the above on all of my machines. In my experience, the older Berninas and the older Singer win hands down. There's just something about those all metal, sturdy machines. Maintenance is a snap, too - de fuzz 'em and oil 'em occasionally.
We've all had different machines, different experiences. Bottom line, as many have mentioned, after trying out different machines, please get the one that works/feels the best for you and and from a dealer that can offer service, lessons and a good warranty for you. Also, you are the one that needs to be happy, not the sales person. Machines are usually a big investment, so do your homework and then make the best decision you can. Let us know what you decide. Have fun!