Does the SJ4000 have image stab'n? Prior to getting a Virb, I had a miniF9 cam (off
ebay) with no IS, which was OK on a helmet, but when mounted on the handlebars did not cope with the additional transmitted shock/vibration at all well... The Virb does a pretty decent job with IS, on the bars - IS & lens correction is only available on 'ultrazoom' - which is still pretty wide angle... One thing to try on the SJ is using 720p and 60fps (if available & if a real 60fps) - I mostly just use 1080p 25fps (PAL) on Virb, for commuting.