4x more horsepower i meant that it is 4x faster in technical attributes, also sound is better, but of course is better with headset. Firmware i meant the OS and software, which is much better then the blocks and 3 buttons of the DS lite. Picture editor and taker is still good, its like saying why have a camera when i can take pictures on my phone? DSI shop could have good items. Free internet browser is cool because its mobile and small(although slow, better then nothing). slimmer, wider screen, and longer ds is always nice. Going back to DSI menu without shutting off is a handy feature. Sound recording is i admit, not awesome but still handy if your bored.
Thats why the DSI is better, i just proved all of your reasons why not to get one is wrong, A.R.C.