Hmm, I used Mini fine on the Apache, but haven't tried it on my Titan/6800. I have, however, had a few issues using Opera Mobile and PIE, data-heavy sites can sometimes lock it up, and it's vastly less responsive than the Apache was when that happens. I'll try installing Mini as a backup soon, PIE's much better with 6.5 than it was with 6, yet still lacks a few features I want (Tabs, and general responsiveness).
Re: Opera Mobile 9.5, I'd suggest trying the new 9.7 beta instead. 9.5 was designed entirely for touchscreen devices - you couldn't use the hardware keyboard at all, incredibly annoying. 9.7 fixes that. Bit slow, and it has locked up a couple times, but awesome when it works! Yay the new Turbo feature.