While we all have personal favorites amongst the offerings of commercial meaderies, if you're really looking to calibrate your palate to the taste of more universally recognized stellar examples of mead, you should investigate the winners in commercial mead competitions.
Let me suggest that you go to the Mazer Cup commercial results webpage:
http://www.mazercup.com/mci_meadery_results.htm
There you'll find the award winners from the past three years, of the world's largest commercial mead competition. You can then Google the winning meaderies' websites and find out if they can ship to your part of the world. Many (if not most) of the meads that have medaled in MCI competitions are priced at less than $20 per bottle, and ordering directly from the meadery ensures that you get product that has been under their supervision and control right up to the point that the bottles get shipped to you.
Although I like to patronize my local wine shops whenever possible, the fact of the matter is that direct mail order from the meaderies themselves is often the only way to get award winning meads in many parts of the country.