What besides the larger throat do you need/want in features? That's where I would start.
For me those would include:
Good lighting
Needle up/down position
Stitch size manipulation
How well does it sew the blanket stitch?
Does it handle thin fabric without sucking it in the feed dogs?
Does it get bogged down by thick fabric?
How well/easy does it wind the bobbin?
Does it indicate low bobbin (and how does it tell you)
Does it drop the feed dogs for FMQ?
Does it have a walking foot (preferably built in)?
Does it have a free arm?
Not necessarily in that order - but those are the things I want to look at.
I would also read user reviews.
Pretty sure the right machine will raise its little foot and say: pick me plesae.