whick IDE would you recommend me for Smartclient?

Hello everyone,
I am planning to get Smartclient Pro edition to build a web app running in a local network connected to a mySql Db, with the alternative of moving later to GAE connecting to cloudSql Db. We'd use Visual Builder as much as possible.

I have a few (silly) questions as follow:
1. would all that be possible? ... Smartclient Pro > local + mySql and then > GAE + cloudSql ?

2. what IDE would you recommend me in this scenario?
(Eclipse, Aptana, etc?? -- I haven't used any of them)

Thanks in advance, Fausto