Thankyou for the ideas.
According to the ATI site, their 7500 supports DVI-out up to 1600x1200 but I've not seen a fanless one so far. The XFree-86 site says it supports those cards fully, including the dual-display capability (though only one of that card's outputs is DVI). If I can find a fanless one then it'd probably do. I don't think there's much point for me in paying several times as much for a 9x00.
The Matrox P650 seems like overkill, but a G550 might be an idea.
A Philips 200P3, you say? That's worth knowing. Now I've found the 200P3G on their site, but it doesn't state brightness, contrast, response time or viewing angle. The lowest price www.pcindex.co.uk
knows for it is £945 inc. tax. That puts it among the less dizzyingly expensive of the 1600x1200 LCDs.
Good point about the 2-D NVidia support, blahblahbloo.
Tigr, it looks as though the Geforce2 MX is rather hard to find with DVI, if it exists at all.