For an enterprise startup with cutting-edge technology on the verge of acquiring its first client, the average Series A funding round at pre-revenue valuation can vary depending on the industry, location, market conditions, and the specific technology involved. However, a rough estimate could be in the range of $2 million to $15 million, but it's essential to conduct thorough market research, financial projections, and seek advice from experienced investors or advisors to determine a more precise valuation and funding target.