UPS wanted a signature for the XL newegg sent, doh! Had them hold it for pickup and biked the ten mile round trip to the UPS warehouse (could have drove, but less fun). The red looks alright, I wouldn't have felt strongly about either color. It looks cheaper but not as cheap as it did in a members post a few back. The speakers may be quieter but are enough for me as I will mostly play by myself in an otherwise empty apartment. It may be possible the stereo effect is enhanced by the extra little separation they get from having a wider screen inbetween.
To echo others' statements, it's comfy to hold and more immersive with the bigger screen. I wouldn't want to try and transport this in anything but a large cargo pocket personally. The stylus is nicely placed on the side but manages to feel extremely cheap.. Almost as if they bothered to make it hollow, but I doubt it is. A 4gb sd card is included as well as charger and AR cards. Also, to iamthecheapests dismay, a system update is already available. (shades of Sony?) May also be worth noting the select/home/start buttons still have an annoying lack of depth when pressed.
All said and done, I do feel it's the definitive way to play 3DS even with some flaws. Hey, I just turned 30, I'll take bigger screens gladly. If it's within your means, I say go for it.