asterisk users - Mar 2006 - pstn to asterisk, DVG-3004S, MP104?

Hi all,

I want to link three incoming Bell Canada centrex pstn lines (which 
currently go to an old norstar pbx) into asterisk.

Can anyone suggest the most "painless" (i.e., "just works")
way to do
this? Has anyone used the D-link DVG-3004S four-port FXO-to-sip adapter, 
or the twice-as-costly Audiocode MP104-FXO-C3S?

I know the Digium TDM400P or Sangoma A200 are options too, but it's 
physically easier for me to use an FXO > ethernet appliance (simpler 
wiring).

I've had problems with hangup detection in some tests of different 
approaches...

Suggestions appreciated!

- Mike