That's important advice- I'll take it to heart.
It's really hard to change the dev schedule (with 3 guys supporting 6 clients until funding closes), but I totally agree and will elevate the threat level on web landing.
Btw investors are also going to check your website, and even though they'd try to stay objective and focus on core (team, idea, market blah blah) the appearance of website will have at least subconscious effect on their image about your company, and thus on the valuation.
In that way "investing" bit more on your website may increase the investment on your company.
In that way "investing" bit more on your website may increase the investment on your company.