oh, dont we have a budget here? in that case, a 3825 with adsl wic, plus an E1 card and might as well through in ISDN backup (BRI Card) for just in case
Yes, Mini-itch I think we have established that you think D-Link routers are cool - you don't need to state it again. Also, you sell D-Link routers so no-wonder you are promoting them.
Asus have some great routers, but are not cheap. Certainly one of the better ones out there!
Generally with a router you'd look at the chipset it is running followed by the firmware - pointless having great hardware and then the firmware is full of bugs or does not let you make full use of it.
The Broadcom and Lantiq chipsets seem to be the preferred ones, with the commercial stuff at least.