Vista - Exchange 2007 - Queue Size

It seems that I'm too noob in Powershell for my needs yet

I do have 3 exchange servers, and I need to pull out some basic stats
from them

$computers = "MAIL01-SD","MAIL01-VN","MAIL01-FL"
Foreach ($objItem in $computers)
{
get-message -server (get-qadcomputer $objItem).name | measure-object -
sum size | ft $objitem, count,sum -auto
}

The result I get is not too bad, but not as clean as I would like too
MAIL01-SD Count Sum
--------- ----- ---
86 113708048


MAIL01-VN Count Sum
--------- ----- ---
66 720221


MAIL01-FL Count Sum
--------- ----- ---
38 60242649


What I would like to get is something just a little bit cleaner

Server name Count Sum
----------- ---- -----
MAIL01-SD 86 113708048
MAIL01-VN 66 720221
MAIL01-FL 38 60242649

It would be nice if I can get the sum in MB or GB

and my ultimate goal will be to output this in yellow or red depending
on the sum
let say over 500Mb in the queue (print Orange) over 1GB print in Red

Thank you for your help