I tried a large number of alternative extensions but finally found ARI Image Slider. Not only did this give me the necessary functionality but the support I received from the team was truly excellent - speedy and accurate. The site is now live and I'll very definitely be using these guys and their products many more times. Do yourself a favour and check them out!
Their support is absolutely fantastic - I had a problem that actually was actually a result of my lack of understanding and nothing to do with their code at all. However, they spotted the problem and explained the conflict so I was able to resolve the matter simply! Definitely a must have extension.
The ChronoForms component is definitely a 'must have' I cannot recommend it, or the support you get, highly enough.