1.012 or 1.5 beta 2 advise - Joomla! Forum - community, help and support

i begin developing site european chapter of large global group.  considering developing site on joomla 1.5 beta 2 rather usual joomla 1.012.  users of joomla 1.5 beta 2 consider systems stable enough use professional site? 

i thinking upgrade path beta 2 release final 1.5 stable easier upgrading current stable next 1.5 stable release?  may not have lot of time re-develop site post 1.5 release.

thanks advise can provide.

to quote beta release notes on home page

a beta version not considered ready production sites. release candidate out development workgroup says done, , consider production ready.