1. New Computer (Recommended specs.)
I also asked film composer Alain Mayrand the specs for his PC. I know we both use Finale for orchestration writing, so it peeked my interest. His PC specs are: Intel corei7, 4 core cpu. 16 gigs of RAM. Basic video card. Ultra quiet cpu fan, not stock model. Very quiet case as well. Not a complex thing, just get the strongest cpu (Intel only, from what I understand) and a lot of the fastest RAM, not the cheapest RAM. For soundcard, M-Audio Firewire 410. (For keyboard he uses an M-Audio Keystation Pro-88.)
Hope this is helpful!