Unfortunately, i never had the chance to deal with newegg as until recently, there was no canadian branch, and Newegg USA was unwilling to ship to Canada. Now, there is a canadian newegg but their prices are so ridiculously high and their inventory so limited it just does not seem worth it.
Nevertheless, i doubt newegg would be willing to coach you on AGP videocard choices, they are after all only retailers. You might have to look up the original manufacturers website to figure out which would be powerful enough.
For resolution, i know for a fact the Nvidia 6XXX series was more than able to display 1440x900 and some 6200 fanless are available on newegg. I had a 6600 myself and it was more than enough for 1440x900. It was modded with a VF700-Cu cooler (which was still too noisy for me).
If you need more punch but still want to purchase an older generation card, i remember there was a fanless 7600GS, probably by Asus. All for all older AGP cards, actually finding it available somewhere will probably be the major problem as it is not listed on newegg.
I would stay away from the FX series (most AGP fanless card on newegg belong to this series) as they are way outdated now. Then again if your needs are very limited, they might do the trick. No idea whether or not they can run 1440x900. They would probably if a recent Nvidia drivers exists for this series.
In even older generations, i remember the ATI 7XXX and 8XXX had some fanless videocards but those might be not enough for you and difficult to find now. (I remember i had one of those, i'll look up my storage boxes to check whether or not it was fanless
As for the Asus silent, it might indeed be too much, considering AGP is at a dead end now so it's not as if you would use it for a long time before building a new computer. Plus your Pentium 4 might actually bottleneck this card, though for you applications i would not matter very much.
After you have determined what GPU power you need, you might also be able to purchase a fan-cooled card and mod it with a fanless cooler. I modded my own AGP X850 pro with a HR-03 before i swapped it for a HD3850 with an Accelero S1. It might be a little involded for such old tech but if you intend on keeping your computer for a long time, it might be worth it.
There ! Hope it helps.
I hope you can get a refund for your screamer 9550.