I love the speed of bolt but the bb browser just feels better to use. opera has been having issues that may be cleared up by now. but bolt is a fantastic browser just not as nice feeling as bb browser.
Used Opera on my Tour when it was working and it was ok the stock one is so slow. Browsing on a BB is like pulling teeth until webkit comes out with os 6.
From browser go to Menu>Options>Browser Config. Change Browser ID to Firefox (seems to work best for me). I also use Column View for better reading. Browser works fairly well when on 3G and strong signal. Browser is lightning fast on WiFi. So, imo, the best browser is the native set to Firefox, Column View, using WiFi.
Posted from my CrackBerry at wapforums.crackberry.com