mydomain.com/store? or simply mydomain.com?

[zcnb]

Most examples I have seen give it its own subdirectory (e.g. 'store' or 'cart') under public_html, then either:

1. Automatically redirect (without delay) mydomain.com to mydomain.com/store, or
2. Automatically redirect (with delay) mydomain.com to mydomain.com/store, or
3. Let the use click a link in mydomain.com that will take her/him to mydomain.com/store

An example of instant redirect can be seen at http://www.wannabetsd.com

An example of delayed redirect can be seen at http://www.treoantenna.com

An example of manual redirect can be seen at http://www.silverlight-jewelry.com

I know that some of the considerations regarding which of the three to choose for my only store is a matter of taste. But...

Is there any advantage of one over another marketing-wise? Is there some common knowledge/study that says "this is the best option if you want more visitors to buy"?

Also, I have read that as far as automatic redirect goes, the best method is via .htaccess (Redirect 301) and not via the "Refresh" method (PHP, JavaScript or HTML). It is better not only in terms of speed but also in terms of SEO.

There is also a very nice article about the Redirect 301 subject:

http://searchengineland.com/070716-122159.php

The only problem with the .htaccess (Redirect 301) is that it doesn't offer any way to program a few seconds delay before redirection.

Which approach is best in your opinion? If you prefer the automatic redirection, which method do you prefer?

Your thoughts and insight is much appreciated.

Thanks,
Daniel