I too like to experiment, but one thing I never do is replace my BB, I simply upgrade another line, I expected much more out of the new Evo 4. The on-line instruction manual was vague, and some part's of setting's were completely overlooked. The phone does download web page's incredibly fast, unfortunately that's all it does well, coupled with the fact you need a truck battery to power this thing I quickly found out this is just another kid's toy like my former i-phone.
If i would leave BB it would be for iPhone. I will wait, if ever for Big Red aka Verizon to get the iPhone by then, I would be ready to make the change...