[AccessD] SQL Server advice

On a year-old Windows 7 box with 4GB, my question concerns which tool to 
use, the above ... or SQL Server 2008 R2 Express?  The downsides that I can 
see of Express 2008 would be (a) another learning curve (b) the nagging 
feeling that I remember something about these less-than-complete SQL Server 
implementations that is not good - like inability to do important 
development stuff that is available in the full-blown models.  This, iirc, 
was true for one of MS's implementations, long ago.  The upside is that I 
make the enormous leap into another century.  But wait, there's got to be 
more (to both -ve and +ve).

Any feedback gratefully received.

=======I'd go with the more recent version of Express -- if you're already 
familiar with SQL Server, it won't be significant.

Susan H.