I have private insurance (less the dental insurance, which I self-insure) through GMS.
I am 61 and in good health. I do have an extra twenty years of knowledge of the kinds of health issues that members if family have faced. I have factored that into deciding what kind of coverage I need. I also did some research on what kinds of health issues people my own age and older do have.
So, I guess if I were in your position, I would run some scenarios about what would happen if your health or your wife's changed dramatically and/or for the long-term. For example, my sister became symptomatic of congenital liver disease in her mid-40s. This continued through a liver transplant in her mid-50s. Expenses included prescriptions, home care, hospital equipment for her home. Post-surgery she had an accident in her home, which left her in hospital for months and resulted on complications that led to the failure of the transplant. That meant that better than basic hospital coverage was really meaningful.
A family friend and her husband and children were all in a terrible traffic accident, which left them all badly injured and in need of assistance at home. The need was indefinite. The accident also took place in the US, so everyone had the unusually high costs of medical care in the US, followed by the transfers to Canada as each was able.
Less dramatically, my other sister, who is four years older than myself, has in the last ten years had a small stroke, diabetes, and miscellaneous health issues. Her prescription coverage in Ontario (Trillium, which is income-based) covers Lipitor, but without this the medication costs something like $1000 a month. Some arthritis medications, when other medications don't work, cost much more than that.
So, for me, it was important to get significant coverage for hospitalization, home care, and prescriptions. I have a little travel insurance as well, but know other people who travel a lot, who have 90 days of travel coverage each year.
I used to have Coverme during a different break in my career. GMS now suits me better, and is noticeably less expensive. It is specific about its coverage of pre-existing conditions, which I really like. A medical exam will result in much cheaper premiums, which could be a lot of money over the long-term. I am not sure that it would entirely preclude coverage for pre-existing conditions. I didn't go that way, but I have some second thoughts about it.
Hope this helps.