Yeah it's pretty bad. At least on s60v3 you can manipulate it for a while and get a few seconds of reading before it goes blank and you lose control while it attempts to render everything (this, as we both know takes up to 60 seconds on some pages - so there goes the CPU argument).
But honestly...
You don't need to jailbreak to add ringtones, you just need to rename the mp3 file.
Correct me if I am wrong, but aren't there problems with nokia's bluetooth implementation too, such as the fact that it doesnt sync properly with some cars?
Well the phone is very data-intensive whether you're using 3G or not. Just with 3G you get your data faster. I'd invest in a data plan no matter which version you get.
You shouldn't take the internet as the true indicator of who prefers which Ninja Turtles series; in the general public, I think the old one is still far more popular.
As for me, well, I think the first 5 episodes of the original series are pretty close to the ideal TMNT experience. After that...