With the large variety of chainsaws offered on the market these days, it is very hard to answer the question:
Which are the best chainsaws are and which one is best for your needs.
Deciding which is the best chainsaw for you depend upon your preferences, the type of tasks you have in mind for your new saw and the price range that is right for you.
Some chainsaws are less expensive than others. Homelite chainsaws, McCulloch, and Poulan chain saws are relatively lower priced than Husqvarna, for example. With all the price differences you need to understand that all these brand names offer quality well engineered chainsaws and you should not be concerned wit the brand name but with your needs and budget.
Do you really need a powerful chainsaw or do you just plan to do some trimming in the garden? - This is the main question to answer.
If you are only planning to do some garden work every now and then - an electric chainsaw would be fine for you. These are mostly lightweight saws that are easy to handle by inexperienced users. Electric chainsaws are also a bit cheaper than the gas chainsaws.
If you have in mind some heavy tasks for your chainsaw - choose the gas saw as it is most of the times more powerful and is portable so you can carry it around with ease.
Don't buy a super powerful chainsaw if you are inexperienced. Many people got injured by trying to use a tool that is too powerful for them. Chainsaws are dangerous tools and should be used with care.
Most important advice - get other people's opinions.
Ask around for honest reviews. Ask your friends, search online for real people's opinions. Talk to them. Ask them what kinds of jobs they do with their chainsaw and only them which brand they own. This way you would know if their experience is relevant to your needs
These points may be of help to you in deciding which is the best chainsaw for your needs.
More information can be found in the links below.