Hi Cheryl,
If you want a machine for peicing and machine quilting I would recommend a Juki TL98Q or TL98QE, These are semi-industrial machines, so they are heavy enough to handle heavy quilts. They also have a larger neck opening than most domestic machines, they are also very fast. I would recommend getting the 3/16" compensating foot, (got mine on ebay for $6.95) this foot will give you scant 1/4" seams even if you can't sew straight. The other thing is, they are great for free motion quilting, you can put them on a table or on a machine quilting frame. These machines are what a lot of the top nationally recognized quilters use, also many dress designers use them. They are resonably priced, new under $1000. and gently used around $500.00. Also they are metal construction, which you won't find in domestic machines. I also own Babylocks Ellegante, Ellure and Evolve, the Juki TL98Q was the cheapest of the 4, even new.
Also, the Juki TL98Q does come with a maual needle threader.
If you would like more info check online.
Good luck, if I could only have 1 machine it would be the Juki.
Hugs, Gail