Product Attribute System Question

Hello,

I am currently working on a website getting it ready for launch. I have a specific scenario that I need to address. We are in the middle of migrating from one e-commerce platform to another and for that reason we are trying to make it a seamless experience for our customer base. I'm trying to make Nop perform similarly to our BC store.

I am having issues with the product attributes in NopCommerce and how they're being handled. Here is one example of what I'm trying to  

(BC) SOURCE WEBSITE: https://tinyurl.com/ybyf2shy
(NOP) TARGET WEBSITE:https://tinyurl.com/ybp3r69q

In this situation, I need to have a "Please Select Option" or "None" as the default setting. From there you should be able to select your appropriate option. In NOP's current form, I am able to ONLY default it to an option or adding a "None" Product option with zero'd out values. The second method works, but the issue is that it still lets you continue if all of the "None" options are selected. Is there a work around for this?

Thank You,

The tinyurl for the new store leads to 'store is closed'.

See this demo store product
http://demo.nopcommerce.com/build-your-own-computer

One of those attribute types should meet your need for look & feel.  (I'd recommend two radio buttons rather than a drop down ;)