There is a big difference in accommodating 1 vs 2 people comfortably IMHO.
10' is fine for 1 person, cramped for 2. 12' or even 14' would be better for 2, but maybe awkward for one person if cartopping it.
You could look at something like the new Lowe 1040/1240 jons. Starts at around $1000.
If you have the budget, a Marlon or Spratley are like the cadillac options. Built like tanks and will set you back around $2000. They are also significantly heavier.
Used is a good option, though jons tend to hold their value pretty well and not as common in the used market.
Have you considered a pre-owned 12' V-hull? They come up all the time on craigslist and are more versatile IMHO. Jons are great for stability, but have their downsides too. What type of fishing are planning on doing most?