Any good orchestral compilation software available?

Sorry, I actually meant composition Software.

I used to love writing out music on an old program called music writer (creator) by Cakewalk. It was put out back in '97 and allowed a person to write music for up to 96 instruments, and then play it all back as you were writing each track. Since almost all composer software is now loop based, and midi generated (audio to digital capture), actual writing of the notes for each instrument is no long available.

I have tried programs like power-tab, and have seen some basic music writing programs but all seem to have the quirk of not being able to write (and playback) two or more notes of unequal length at the same time. As a classical guitarist, for me this feature is important, and as a composer it makes harmonizing very choppy.

Has anyone found a composition program that will allow the flexibility and note-writing feature that would fit my needs?

So I checked out Sibellius and Finale, Sibellius 7 is around $500, so way out of the question for my current needs. Then I checked Finale and found out they have a free version called "Notepad", though with limited voicing, I decided to download it, and for now it will do what I need from it. Finale's 'Songwriter' is downloadable for about $50. It provides more instruments, and further features that would be indispensable for somebody leading a music program for budding musicians etc. If I outgrow Notepad, then 'Songwriter' would be a more appropriate option for me.

Thanks for the leads. Appreciated!