Olympus XZ-2 wide angle lens recommendation

[aquaticexplorer15]

I have been shooting my Olympus XZ-2 for about six months. I am looking to upgrade it and buy a wide angle lens.
Which on should I buy and why?
Inon UWL-H100 28/67
Idas OWL-05
Olympus PTWC-01

 

[Interceptor121]

Inon UWL-H100 type 1. The UWL-04 will vignette as the lens is flush on the thread. The olympus lens is good but very heavy and can't take a dome