Do you have any idea of the price range?
For a portable sewing machine, you may want to look at the Brother CS6000i:
https://www.amazon.com/Brother-Featu...dp/B000JQM1DE/
This machine has been around for quite awhile, and a lot of quilters on the QB like it. It has quite a few embroidery stitches.
A lot of quilters also like the Janome Jem line for a portable sewing machine:
https://www.amazon.com/Janome-Sewing...dp/B015YCBJN0/
Be aware that any portable machine is going to have a small harp (the area under the arm), making it difficult to quilt larger than lap-size, twin-size quilts.
A newer machine on the market that gets great reviews is Eversewn. Here is a link to their top-of-the-line machine:
https://www.amazon.com/EverSewn-Spar...dp/B073QYJY3Y/
(Honestly, the color and reviews alone on this one would tempt me to buy it if I had any excuse to do so.)
All of the above machines come with decorative stitches.
I would not consider buying an embroidery machine until you first have a better quality sewing machine to work on. Later on, you may want to consider getting a Brother PE770, which is a good starter embroidery machine.
Combo machines (sewing + embroidery) tend to be more expensive. Sewing machines with bigger harps tend to be heavier, bigger, and less portable.
Edit: Do not get rid of your old machine if you can help it. It's always a good idea to have an old workhorse machine as a backup. Most of the newer machines do not last as long as the vintage machines.