Hi Danny, thanks for your response. I realise I can load lots of images at once with WP but its allocating them within a post thats tricky. I have no problem with it, but my non internet savy clients who have no time to spare want it super quick and simple, which is why I have built them custom sites so far so I have control over how images are handled.
What I'm after is to be able to add a new post, and from that 1 page load 15 images, (the first being the main image and the featured image), type in the title and text and hit publish. And for the end product to have a main image (1st one added) and a carousel of images below.
From what I can see of NextGen, I would have to create a Gallery first, then go to the post. That will be a step backward for the client who is use to controlling everything from one page.
From what I can see of Responsive Gallery, you can't control the size of the images which would be a problem. Not sure exactly how it looks in the CMS as well. Any screen shots?