I don't think you can compare those two sets of speakers - the particular Acoustic-E model for £70+ more is obviously of higher grade.
If you're not an 'audiophile', the £28 Altec set should be more than enough. Look closely at the dimensions of its subwoofer with relation to the space you have though. Some reviewers mention they didn't expect it to be so large.
One that gets good reviews is the Logitech Z-4 for ~£18 more than the Altec click here. G
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