hello budy, 

I have a table with 2 variants of different colors, same price (as 100 usd/unit). And I have chairs with same 2 vairiants of different colors (also the same price as 25 used/unit). They are available to sell on both sales and Point of sales. I can sell them by set with 3 table and 2 chairs, the customer is able to choose 3 table (whatever color) with 2 chairs (whatever color). 

What should be the best options with below solution:

1. Native solution with variant grid & session feature in sale order line
2. New set product with combo type with combo choices (table choice and chair choice)
3. New set product with BOM

Thank you so much for your help!