Newbie needs info on modest laptop speakers


Hi - I'm very much a newbie...so everything I've browsed in the forums so far looks like Greek to me...!! I have a laptop provided by my employer so am limited to what I can do, except maybe hook up a good set of speakers. What I'm looking for is "gotchas" like the speakers need to be a minimum wattage, etc.
for a Dell D630 Latitude. Thank you!!
monamotz
Mackie MR5's or 624MkII's if you can manage to budget a bit more.

Audition at a local Guitar Center and take home for a no hassle 30 day period.
I returned my MR5's no questions asked to step up to the 624MKII's.
The Swans HIVI SW3 are about 80 bucks and include a t-amp. No real deep bass, but wonderful soundstaging and really enjoyable. The AudioEngine 2's sounded very hifi to me, the single driver SW3's sound more natural. There is a short review on 6moons. Kind of hard to find..look for the HIVI website