Hello Kevin,
Just by asking this question you exhibit way more intuitive knowledge than many seasoned SEOs out there.
First you need to think about the intent of the searcher. Do they want to read about Biggie's influence on hip hop, or do they want to buy a pair of Biggie Smalls Versace sunglasses? Being an ecommerce site, I'd go with the latter.
Second, you need to think about scaleability. It is great to customize every title tag and meta description completely, but that isn't always scaleable across several thousand products.
Some other tips:
I always liked adding in offers and unique selling propositions on key products. The offers might be temporary and subject to change, which is why you need to keep it scaleable. The last thing you want is an angry shopper who saw an offer in the SERPs that is no longer available on the site. This might only be your top 10-50 products out of thousands, but typically those represent the majority share of revenue on most ecommerce sites anyway. Some examples:
Buy Biggie Smalls Versace Sunglasses - Free Shipping from Company!
Biggie Smalls Versace Sunglasses: Save 10% with Company!
Authentic Biggie Smalls Sunglasses from Versace - Save at Website.com!
You get the point. These titles are obviously written for shoppers. They are at the point of the buying cycle where they know exactly what they want and are just looking for a good deal from a trusted, reliable store.
If you're targeting someone earlier in the buying cycle who wants Versace sun glasses but do not yet know which kind, they should end up on a category page.
If you're targeting a Biggie Smalls fan who doesn't even know they "want" a pair of sunglasses yet, well that's an entirely different type of landing page and marketing activity. Conversion rates from the SERPs for that target market would be dismally low on a product detail page. An article about Biggie Smalls would be more appropriate. Something specifically dealing with the phenomenon of merchandising around the name of a deceased artist might be particularly appealing and link-worthy.
Good luck!