And remember, "best quality" is very subjective. There are objective criteria to apply when rating any given model, of course--for example, we can ask if he parts fit well, is it accurate, is it easy to build for a modeler basic, moderate or advanced skill, is it reasonably priced or expensive? But there is a lot of subjective content to be found. Some guys prefer this manufacturer or that, some put more value on accuracy over price, others price over parts count, in short, there will be almost as many opinions as there are modelers.
And even within a manufacturer's catalog, there can be kits that are well done, and others that are generally looked on as bad.
Gundamhead gives good advice--check the web and look for kit reviews. Many scale modeling sites have kit reviews, and generally, the authors try to be as objective as possible.
