I would question why you even type the name of your main search engine. You can set it as your browser's 'home', so that pressing the home button brings you there. You can put a bookmark in the bookmark bar that is always visible.. Most modern browsers have a search field or a URL address bar that can be used as a search engine field (you set it in the preferences), or they auto-complete URL (so that you just type G and maybe O and it'll suggest "www.google.com").
Personally, I have my Chrome set up so that I can search from any search engine from the address bar with one prefix letter; so "g something" is google search for "something", "a something" is on Amazon.com, "i something" is on IMDB.com, "b something" is bing, etc.