I had a Kenwood 72X "TrueX" CD drive. Here's a brief rundown of the advantages / disadvantages of it:
* FAST AS HELL!!! You don't need it for games, but it rocks when you are installing tons of software. (I still use it just for this purpose.) This thing's dangerous, though; it makes reinstalling your system almost fun.
* Very quiet. About as noisy as a quiet 4x or 8x CD drive, which is not that noisy.
* Consistent high throughput. Less of a speed difference between the inner and outer track than standard drives. This is why they gave them the "TrueX" monkier.
* Very high return rate. I don't know the numbers, but the whole product line, from the 52X to the 72X was plagued with returns of units that failed to read CDs after the first few months of use.
* Very finicky about media. When it does to decide to read CD-Rs or RWs at all, it reads at much slower speeds.
* Sucks at DAE. For regular DAE, it's fast, but the quality is somtimes sketchy. When I tried to use Exact Audio Copy, I would continually get errors, with an overall throughput of about 0.1x .
So, unless you're running a server that mirrors install packages for network installs of commercial programs or something, don't bother trying to get one.
Here's a comparitive review
of this unit at Storage Review.
P.S. Some optical drives have speed-limiting utlities with them that let your stipulate a maximum rotation speed. I think that Asus drives are supposed to have this; I don't know what others do.