I do like the design. Quite a lot. It's modern and sophisticated. I really like the subtle detail of the base top being inset to create a reveal right under the sunmica top. I assume the width and length of the sunmica top is exactly the same as the base, it seems that way from the drawing. I like that too, it makes the reveal more purposeful. The short sides are best left plain as i think you planned. You don't show the short side so I'll assume the base connects at the top and bottom, and the field open. I like the antique polished gold for the base. I like it in concept, I don't know the room it will go in. You're very on track, so I'm sure that is the right finish for your space. For the top carving, again I like the deep brown polish. I think it adds more to the piece by having another finish. I'm curious about the overall height. What is it? Also, the table is large. Not huge, but large. I don't think you need to make it smaller, I just want to bring this to your attention so you make sure it will fit in your space properly. Finally, the mirror. Are you using a plain mirror? Smoked glass mirror or a mirror with a slight antiquing would be great.

something round, or that has curved lines. the last one's the most $$$, but oooh, it's pretty.

There is no average height for the table and chairs.There're height standards for all the furniture. The standard height for the table is 30" and for the chair, it is 18". The depth of the table should be atleast 36". It might be a little broad say 42" but not more. The length if the table is defined with the seats required. The chair seat size should be 16" with the back height be 30" atleast. It might be more depending upon the design of the table.

Price is not a function of design. It depends on the finish n material. You should specify what your budget for a stone top dining table set is.