Looks like things are coming along. I'm not a designer or programer but do develop the initial parts to a website at the ad agency I work for, mostly site maps, wire frames and some content. Based off my experience I would update your site map to include "about us" page, maybe combine the Pricing and Warranty info to one page and to list the products as a sub category under amps.
The About us page I thought would be a nice page to explain your approach to amps and tone, etc. as well as speak about your amp construction, wood and other products used. You can also add photos of the shop, amp and cab construction shots, etc. All the stuff a visitor would want to see.
Site Map Suggestion
Home
Amps
17 series
OD 100
Custom
XD
Mods
Sounds
Pricing and Warranty
About Us
Contact Us
As the footer to your site you can add Terms of use link, privacy policy link, copyright as well as maybe your social media links if you have them.
On the home page you list "contact us" in the nav bar and also have the email address listed below the nav. I would remove the email address from the home page. Also, listing email address on the web is not a good thing as everyone including Spammers have access to them. You might want to ask the website company if they can provide a contact us form in the "contact us" page where visitors can fill out the fields and submit to you. From there you can reply through email safely.
I'm sure there are others here that can also provide feedback and probably know more about website development than me.
Anyway, hope that helps.
