Be careful not to price yourself too low. The majority of the competition is at the low-end and it is a very hard place to be. In my opinion, the above prices are too low, but I am also not intimately familiar with your geographic area.
When I first started my business, we tried to compete on the low-end. The reason, that's where I thought everyone started. After struggling on the low-end, an experienced businessman and adviser told me, "Raise your prices, then you aren't competing with those guys anymore." It couldn't be that easy. Could it?
Yes, oftentimes it is. You also have to change who you market yourself to. There are lots of people out there who only shop on price. There are also those who shop on quality, and a super-low price is a deterrent to selling to those people. They see a low-price and assume low-quality.
Shoot for middle of the road on firms who have the capabilities that you do. If you are priced on the low-end, you are competing with 80% of the firms out there. Raise you prices above their mark, and your competition drops. You will also have profits and capital reserves in order to market, expand and invest in better technologies. You will also not wonder why you are working long hours for minimal pay.