Re: Sound sucks on Vista or is it something else?
G'day Duncan,
unfortunately I'm only relating what I've been told in another forum. I've quoted his reply to me below:
I have been testing the X-Fi range for sometime on XP and Vista and is many times better than Audigy - the info you want is as follows -
If you want to use the card for music creation and soundfonts then the first X-Fi card was the X-Fi Music card which has a soundfont manager loaded with it - I used this card for sometime without problems
However the X-Fi Music card is to be superceded by the X-Fi Xtreme Gamer (don't be put off by the name) it is also a half card as opposed to the X-Fi Music being a full card
Both do the same job and have Entertainment - Gamer and Music Creation modes and both have a Soundfont Manager and "What You Hear" feature which makes it easy to record without leads out and leads in.
The X-Fi Xtreme Gamer card has several extra features like - lower noise and a connection on the card that with take the Intel HD soundcard lead so that you can then also use the front panel sockets as well.
The X-Fi Music card has better brass sockets and more of them for things I do not use SPDF etc - but the X-Fi Xtreme Gamer has what I want and the one I recommend.
You can of course go to their higher level card like the fatal1y/Pro but we could find little benefit for the much higher price.
Keep away from the X-fi Xtreme Audio as it has none of the music creation requirements.
From this I gather that you can use soundfonts fine if you don't have the "Xtreme Audio". This being the case, then you only need to be concerned with the quality of the sound fonts you have...
As for the Yamaha SW1000, I know nothing about it except that it seems to be a very old (circa 1999) PCI card. I doubt there'll be vista drivers for it...
A possible alternative I've recently come across is the Roland Virtual Sound Canvas... I recently purchased "Band in a Box" as a practice tool - it's working quite well in this role too I might add - automagic rhythm section
It (BiaB) came (as part of a Christmas special) with a copy of Roland-VSC as both a straight softsynth AND a DXi synth. The softsynth works fine in XP but isn't compatible with vista... The DXi version works in vista but you don't have GM support - NWC would need to be modified in order to use it... Or possibly a GM "frontend" or host for DXi synths may be available - I haven't explored this...
I do know my Yamaha S-YXG50 won't work in vista either... 
Edit - I meant to mention that the VSC is fundamentally similar to the m$ GS wavetable synth - just bigger and with more instruments - some of the basic sounds don't seem to be a lot better but there is some improvement... E.G. the brass is "smoother"