Allied Telesis (Telesyn in the US) also makes access routers that are likely to work pretty well (I haven't used those products from them personally, but other products of theirs have always been surprisingly solid, especially for the cost).
Really seriously, though, a used low-end Cisco (1700, 2610, etc.) can be gotten cheaply - less than $1k (a quick EBay search says maybe $600ish). By definition, if you have a T1, you're paying an interesting chunk of change for that service - probably circa $500/month for the circuit, plus ISP charges, and you're probably paying $1k or more for the install (that, or it's being amortized into higher monthly fees). Is it worth risking that service working to save a few hundred bucks on the router? I don't think so.
I don't particularly like the Netopia units, though, I'd avoid them. You seem to have to reboot them to make any configuration change, and their DoA and longer-term failure rates are very high. I put more confidence in an EBay special Cisco 2610's reliability than a brand new Netopia. (my experience here is primarily with Covad-sold SDSL Netopia units, but this appears to be a systemic problem)