Sorry, can't claim any actual experience with those particular models, but my current router is a Cisco 4-port SOHO, co-branded LinkSys (yeah, it's that old) and I've not been disappointed at all - and (obviously) it's still going strong, with no complaints. I have the same whacky setup you do (my nicely configurable Cisco behind my ISP's minimal "configure? wachootawkinboutwillis?" router), and about the only thing that seems to have problems is publishing from FrontPage (yeah, I still use that, too - but I've basically beaten it into submission, and don't get classical crapcode out of it).

I don't see a lot of difference between the 130 and the 180 by the spec sheets, and what differences I do see strike me as being the kind of thing that wouldn't likely be used for a home system, but might be useful for a small business that wants to professionally manage their IT.