Shopify Website Changes (Design + Programming)

Description

We are looking to update our shopify website with improved customer experience and design changes.
Here are the tasks that need completing. We are looking for UK based experienced shopify developers who can design, or have designers as part of their agency.
1. Improved related products at the bottom of product pages. We have 4 or 5 products we would like recommended based on the products either a) tag or b) category
2. I would like the header to be changed to a more modern design, We would like the phone number to stand out more and a darker (black) background, It is currently grey.
3. We would like changes to the CSS so internal links stand out more, at the moment they blend in.
4. We would like the information below products to 'flow" better, at the moment it just looks like blocks of text and nothing stands out. We would like these to be shown vertically instead of horizontally.
5. We would like customers to use the search function more, we think it would be better if the customer saw text start typing suggestions of what products to search the website for.
6. A few logo changes on the front page. We just need the brands that we list updating with new brands.
We have similar website examples that we are happy to show. Work needs to be done before we approved it and it goes live, this cannot be done on the live website.
If our budget is unrealistic please let us know, we are flexible as we need this work done correctly by experienced shopify contractors.