Check "Rock House Computers" in the search engines.
This is my website. You can see that the three words easily hit number one. If you only use two of the three, the website drops down. This was done without paying for high rankings at all. Two of your keyword phrases can reach number one easily. The other two would require purchasing a higher ranking from the search engines which could cost you more than you want to spend. However, if you are patient I can show you how to get there without paying too much eventually.