Slow, there are a ton of choices out there. Are you looking for stream use or lake use or maybe both?
How are you going to transport it? On the top of your vehicle, TD or other trailer?
Who will help you portage/carry it to the water? This has to do with your ability to lift and carry it.
My wife and I have two Wilderness Systems Tarpon, 10' and 12' and I as a retired person can lift them to a vehicle ok, but not carry them far. So I will make a cart to use for that.
I can list several good manufacturers which I know are in the East and across the country I think. If you want them, let me know. A good thing to do is to find a local dealer for the brands that are common in your area and go talk to them. Many have demo days. I would strongly recommend that you do not buy anything without at least getting into a few to make sure a given style or model is right for you.
A light unit may not be as stable as a wide one. But the wider one probably is heavier then a narrower one. Find a kayak fishing forum that is right for your area of the country and browse it for ideas and comments.
Then there are choices of "sit in", "sit on top" and canoe/kayak style hybrids. The choices are varied and long.
Prices for decent new models can run from $500 to, well you pick it ($1000-2500). Our Tarpons went at $650 and $850.
Hope this helps some.