I have used Reason in the past with ReWire but that dominates my CPU too.
The Sound font player is very very light on CPU, lighter than a Synth. And easy to use.
Samples or Sound Fonts depend on RAM being Audio files, not CPU. So yep will be lighter on CPU.
There are hundreds & hundreds of free SF's on the net, just google. You can build up quite an impressive library,
And of course you can benefit from all the extra articulations, which will give you the authentic soundiing Orchestral sound.
Another free Sound Font player on the link OldG supplied. It is Multi timbral with 16 midi channels.
Sound Font player
I used to use sound fonts before going over to the Kontakt Sampler.
Kontakt meant i could use the large Orchestral Sample Libraries now available.
Edited by lowdown, 25 August 2011 - 11:16 AM.