I use the bolt browser, seems faster to me on my bold. My girlfriend prefers opera on her huron (8820). Use used bolt for awhile and then went to opera, she likes the interface better and she says it loads faster. I'm guessing therefore that its all about individual preference. Try them both for a week and then make your decision. I think the blackberry brower is slow.
I went from using Opera Mini to using the Bolt browser. I fine that it is much faster and the navigation around the page is alot better as well. But its all based on preference. Personally I think Opera Mini and the Bolt browser are better than the native Blackberry browser. Anytime I have to download something OTA I muste use my Blackberry broser for the download prompt to appear...using Opera mini and bolt doesn't work for downloading apps for some weird reason. It's probably just something im missing but dont care too much becuase it barely affects me. Anyways yea, Bolt browser for me!