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Browser support for UTF-8 is excellent these days, with IE5.x and above and all Mozilla/Firefox/Safari/Konqueror and Opera (above about version 5) browsers having no problem either.
The only problems occur when the display font does not have the appropriate glyph for the symbol (which is equally a problem if you use entities), when the page is saved and viewed offline (you should always use a meta charset element even if you set the charset with a HTTP header), or in much older user agents such as Netscape 3.x or 4.x.
Make sure that your editor is really saving the document as UTF-8 rather than assuming windows-1252 - you can't just change the meta charset and expect it to work. Most proper web editors can handle UTF-8, including Dreamweaver, but some non-web editors such as Notepad will cause problems.