As for best place to shop for insurance, I always try Kanetix before I buy any car (new or used), and every year before my insurance is up for renewal. For the past 4 years TD has been the cheapest for me, but that doesn't mean it'll be cheaper for everyone. It depends on how many cars/drivers you insure, if you insure property, and of course it depends on your record, experience, etc.
Before you commit to anything, make sure you shop around. It's best to compare car insurance quotes offered by insurers and brokers (it's best to get a minimum of 3 quotes). You should make your final purchase with the company or person who provided you with the best service and a competitive rate. The insurance representative should take the time to answer all of your questions and make you feel comfortable about the purchase.
Raising the deductible limits on collision and comprehensive coverage lowers monthly insurance premiums. By taking on more financial responsibility in the case of an accident, a driver lowers day to day costs. A driver must be ready, however, to absorb these costs if an accident occurs. Note that in some cases where a driver is not at fault, other insurance provisions or companies may cover some or all deductible amounts. Check with your agent or broker to determine what applies to your specific policy.
Insurance is funny, in a weird sort of way, because rates can vary wildly between insurance companies. Also, premiums often change so the insurance provider who offered you the best rate two years ago, or even last year, may not be the insurer who offers you the best car insurance rate today. That’s why it’s so important to shop around, because the quote you get from one company can be significantly higher (or lower) than the quote you get from another.