You need to know your clients ... I need to know my brand.
I just received an email (marketing email) from Lucky Brand Jeans ... I visited the site. Right away I concluded this is not my brand. I just looked at the models on the web page and decided that I will spend np more time.
2/3 of Internet Browning is done by mobile devices. So your website should be capable of adjusting the display on smaller display. I took a train from Tokyo to Osaka yesterday and I check the websites of those companies I saw signs from the train moving at 150MPH.
There are many websites that are not mobile friendly. There are a lot of business opportunities here.