How bout the general hardware/technical chat?
And i recommend TSOP, because its free cost's you nothing, and you can pass on the savings to your customers if you want (i havent really I charge $80 (AUD probably 50ish USD) which is high in my opinion, however I offer a full service with the software, loading on all the apps they need, show 'em how to use if it neccessary, and upgrade their software for free if they drop by(xbmc and dvd2xbox especially).
I have never done a modchip, I usually ask them if they will use xbox live, But i tell them the downsides of xbox live (original games, xblive subscription in addition to broadband, possibility of getting banned), and the alternatives of xlink etc. Most people get the mod to save money, so they aren't interested in xbox live if they know about xlink.