DOORS/WINDOWS Software

I need something which can give me diagrams and possibly 3d of WINDOWS and DOORS (Upvc/aluminium).

Can you recommend any good ones ?

I saw online COVER3d, which looked good..do you recommend ?

Its mainly for quotation purpose for showing to clients.

So you make custom windows and you want to be able to show your clients what their windows will look like after they are fabricated?

Cover3D looks good but do you need that level of detail?

For those of you who are interested...

http://www.cover3d.com/software%20tender%20doors%20windows.phtml

thanks for ur quick response !

Yeh, mostly its standard windows of SLIDING or SWING (casement).

Do you think there are other softwares which you can recommend ?

I do not have any recommendations at this time. Sorry.