Blueray discs spin slower than DVDs as blueray is a new format and is currently slower than the HD DVD format, the xbox's disc drive spins discs at high speed when the game is read of the disc instead of the hard drive, when you move the xbox suddenly when it is spinning, the disk flys out of the grip of the motor and the thing that holds it down because it is at high speed, so for example you put a disk on a motor and make it go to full speed and make it fall of the motor, it will fly across your room because it is still spinning at high speed (over 4000 RPM).
Plus your not going to rape the xbox when you are playing a game (at least i don't anyway).
Don't know if that made sense.
I have an arcade with a falcon, the falcons that were also put in the elites, it hasn't RROD once, xboxs made late 2008 (after august) will have the jasper chip set with a 65nm CPU , which means less heat and less power consumption, they are less likely to overheat.
Arcades are striped down elites and premiums (without HDD, headset and stuff like that) , with a white case and a matte white disc drive bezel.
Frame rates are all the same offline (locked at 30FPS) , PS3 or Xbox doesn't matter, when online, that depends on you internet speed and connection and graphical looks depend on what game you are playing.
The thing about having to install games on a PS3 is true, not sure why, maybe because of noise, most games have to be installed on the hard drive, some don't.
Controller design depends on what is more comfortable to you, not to everyone else.
Games also depend on what you like.
Microsoft require you to pay for 'xbox live gold', which 'unlocks' features within xbox live other than buying things, also xbox requires 'microsoft points' to buy anything on xbox live, you can buy them at shops that sell xboxs (most shops).
About hard drives, on PS3, you can buy Laptop (2.5") hard drive (not sure about a capacity limit) and install it in the PS3 and it should work automatically.
Xbox hard drives are formated exspecially for the xbox by microsoft, you cant get any hard drive and install it, it won't be recognised, the highed capacity hard drive i,ve seen for xbox 360s (old versions) are 320GB -
http://www.amazon.com/320GB-Hard-Drive-HDD-Xbox-360/dp/B00656HLGO/ref=sr_1_5?s=videogames&ie=UTF8&qid=1345326334&sr=1-5&keywords=320gb+xbox+360
If you want to sell your PS3 for an xbox is up to you, just remember you have to get new games for xbox and sell your old one and you have to get used to the design of the xbox controller, noise wise depends on your room's temp, where you put you xbox and which xbox you get and if you install xbox games to the hard drive (still requires the disc to be in the drive but it only starts the game).