A moderately priced possibility is a plug-in for a sax quartet by Linplug.
www.linplug.com
It is called saxplug
This is pretty good to my ear--I play sax and flute and it passes. Most don't though. The larger problem is that the samples in a lot of programs are simply to sterile sounding--I'm a Paul Desmond and Stan Getz fan.-two sounds very difficult to electronically imitate.
It was about 200$ the last time I looked . The samples are adjustable and version 2 seems quite a bit of an ungrade over previous version. You can test for 15 days free but it has an irritating internet registration softare dongle. Anti piracy device I suppose.


dave