Do you mean the 480 TVL -- 21CW[SHR] bullet camera?
The high res version (£125) runs at PAL : 752(H)X582(V) which is the same resolution as most DVDs are ripped/produced at. It's far past the quality of the average TV. The low res version (£88) runs at PAL: 500(H)X582(V).
I can't find them anywhere but
http://www.helmet-cameras.com/helmet_cam_pal.htm http://www.rfconcepts.co.uk/sony_colour_ccd.htm and they're probabily the same company.
Also note, these are wired cameras which improves the quality but makes them hard to stick in obscure places... sorry Felix
The only thing that would let that down would be the recorder. That archos records in 512x384 but its very expensive... £300~. With anything, you get what you pay for...