Re white modem.
As you have the HH5 you don't need a seperate modem as the HH5 has a VDSL modem built in.
I would be interested too see the result of the speed test further diagnostics via a wired PC or laptop connection if possible.
@ sub91. It might be a good idea to tweak/delete your posted images as you're giving out your hotmail address on an open forum.