Careful Writing Requires Work

How shall we deal with parenthetic qualifiers?

(1) You've inspired me to start a webpage collecting examples of poorly designed products, with this as the first product (and at the moment the only one).

is better than

(2) You've inspired me to start a webpage collecting examples of poorly designed products, with this as the first (and at the moment the only) product.

The second rendering is worse because the parenthesis interrupts the reader's train of thought and because it refers to something not yet read ("product"), after the closing bracket, not before. But how about this?

(3) You've inspired me to start a webpage collecting examples of poorly designed products, with this as the first product --- and at the moment the only one.

Or this?

(4) You've inspired me to start a webpage collecting examples of poorly designed products, with this as the first product, and at the moment the only one.

This example shows how much work careful writing is. If on writing sentence (1), even if it is the best rendition, you did not consider alternatives (2), (3), and (4), you are not a careful writer.