Hi billy2mm,
You should check out the ebuyer website, particularly the following "quick codes" (put the codes in the search box at the top of the site)...
If you just want to read CD's then 210670
If you want to read DVDs as well, then 174302
If you want to burn CD's / DVD's, then 184805
I would recommend the last one on that list. I have one of them and it is really handy because it is powered directly from the USB port which means you dont have to carry another power adapter with you! It is also really slim and light, so it should easily fit into any laptop bag / case that you have.
I hope this helps
What course are you doing?