For comparison (or even purchase) click here for retail prices of Creative speakers - the INC VAT prices mentioned include FREE delivery. Some TravelSound models are featured near the bottom.
If your laptop can take 2.1 speakers (which will include a subwoofer - better sound but not very portable), I would recommend them over a bog standard 2-speaker setup. Stick to a known good make like Creative/Logitech/Altec Lansing & you should be OK.
Some time ago I purchased a lovely Creative 2.1 set off Ebay which cost £20 delivered (use it with a desktop PC).