What would be a good first horse for me?

I have ridden horses for 6 years. I love quarter horses and Welshes. I once leased a Welsh cob named Twix for about 2 years and I adored her. But, unfortunately she was sold to a different farm:( I've also worked with a very clumsy chestnut quarter horse named Jon, who was another one of my favorites. I would consider myself an intermediate rider and I am good with stubborn horses. Where would I find a horse for a couple thousand? And what would another good breed be to look?