I honestly would not change your domain. Domain age - like yours being 8 years old is very advantageous to your SEO efforts. Another thing to consider is that all of the links you currently have going to your site which is probably a lot because the site is 8 years old will be broken. So you could argue that this would actually hurt your rankings rather than help you.
Focus on good meta tags, H1 tags and performing link building and social media marketing for the site. Any effort to improve your site in those ways will be far more beneficial than changing the site name to include a better keyword.
You could also try buying that other domain and forwarding it to your existing domain as that won't hurt you.