Getting a superdrive

Hi,

I currently have a Macbook that was purchased a year and half to 2 years ago (when Leopard had started coming with the new macbooks).

These are the specs for my disc drive:

MATSHITA CD-RW CW-8221:

Firmware Revision: GA0K
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw
Media: Insert media and refresh to show available burn speeds

I want to be able to burn DVD's so i'm thinking about getting a superdrive and was wondering if anyone could point me in the direction of a cheap(ish) one that i can install in my macbook (preferably a slot-loading one if there's a choice).
I'm aware a slot-loading drive will cost more but i am not exactly quite sure what i am looking for in terms of the models so if someone could even show me one on ebay that would be great.

Thanks,

Martyn