Sad how sales people try to sell you more than you want to pay these days. But, yes, $4000 would get you one awesome machine!! BUT NO, if it's not in your budget right now, don't try to sell me something I'm not ready to buy.
I bought a Babylock Quilter's Choice that had a lot of nice bells and whistles and paid $900 about 6 years ago (so the price should be a little less now). But I did notice it didn't sew through the humps or real thicknesses very well but it did work great for 99% of my quilting needs.
I moved up to the Babylock Esante after sewing at this machine and felt it had more power. It actually had a larger motor than my Quilter's Choice....so I bought that one. It includes an embroidery module so the price was $3800.
Babylock has great machines in a variety of price ranges with their Symphony (latest machine) being their "go to" quilting machine. It's price is around $1800.
I know a lot of people rave about one of the Janome's quilting machine so just check around before you buy. I actually have a very inexpensive Janome (under $250) that I bought for classes and it's a great little machine.
Bottomline, you can get a good machine for under $1000 as long as you do your homework and try them out to see if they do what you need them to do. It's going to be your machine. Have fun !!