Definitely no on the implants. They would be extremely expensive and make your gums look bad with 4 in the front all next to each other. Implants are not an option to replace crooked teeth. They are to replace teeth that have to be extracted.

The best answer is just get braces. Not sure why you are getting them on your lowers and not uppers at the same time?? Then the teeth are all lined up together into a perfect bite. You could probably use a frenectomy as well.

It looks to me like your 2 fronts are in cross bite but you didn't include a picture of them in their bite. There is an appliance that you wear for about a month that will push these out of crossbite. Orthodontists make them or some dentist. That will help them look better. You could also get an an enamelplasty on the 2 front ones. That is where they shorten them a little. Looks like they are a little longer than the others. This would not be an ideal solution though like braces but may improve the look some.

It is always best to keep your own teeth. Braces can easily straighten your top teeth with no problem. Once you have the teeth straightened you can then decide to either do bonding if its the shape of the tooth you don't like or veneers but I think once they are straightened they shouldn't look bad. You may have to have you frenum on the top cut.