Good to see that you are updating the website and ready to try new stuff.
Here are my comments:
1. The website could have been better and you may want to consider the use of a track back, ( when you select a product and are viewing it, there should have been a link to go back one step)
For example : You are in Nikon >>> Lenses>>>> Prime>>>> 50mm 1.8afd
If you have this as a link on the top then if i click on the Prime it should take me to the Prime lenses category,
2. You have too much of information on the first page : the images make you scroll down to just see. things.
Try changing the varavon, delux gear, think lite to a flash or jpg based rotational banner that will give you more screen real estate.
example of it is :
Home - 35115.templates.site2you.com
Home - 35109.templates.site2you.com
These are only example of what i am saying. the top banner will have them rotating on their own or when a user clicks. and you could display ur premium products there.
3, The Shop by category is too long. Try doing a Breakdown of that category:
For example : you have camera flash, flash diffusers, flash stands etc. All these could have been Subcategories of Lighting equipment. that way the list becomes smaller and more logical.
There is much to do and you have started doing a lot already.
So keep it up and do think about what i mentioned.
Cheers.
R