Imagery suggestions for corporate website

My company, a bespoke software solutions provider, has a basic website created with all relevant text content in place but the site now needs a lick of colour so we are looking for a number of images to appear on the individual pages. Most should be around 100 to 200px wide and 200 ish px high (exact size to be determined but a common theme of two sizes site wide will be used) to sit at the top right of the content pages and could be composed of multiple images or a single image to express visually the content written in the page. For example on the supported platforms of the mobile solutions pages an image comprised of Android, iOS, Windows Phone etc. logos could be used.

Overall around 17 images would be required plus a larger one (or up to three which we would slide) for the front page. However in the first instance your bid should be for 5 images to cover the mobile solutions pages. Someone with similar experience and an understanding of the service we are providing is preferred in order to ensure that you are able to understand the abstract message the images need to convey.

We would expect the majority of images to be derived from image archives (for which we will pay the relevant licensing costs) which will then be modified and spliced with other images, therefore this is primarily a research exercise with a small amount of graphics work. As part of your research we would require you to determine licensing cost for each image and ensure that the license would permit minor modification to the original image where appropriate.

If you have any suggestions or alternatives to the above brief please make note of this in your bid, preference would be given to people who in the future we would be able to discuss ideas verbally with either by phone or skype.