I have the SH46 and it's big enough to hold stuff, but not big enough to look goofy. I don't know about the match. Mine is blue and it's pretty close. I ordered mine from
www.cycleluggage.com. They had the best price, they're nice guys, and fairly communicative. The problem is Shad itself. I have the case and the plastic cover for the mounting plate, but not the mounting plate. Shad is taking its own sweet time getting it to me.
I don't think you need Phil's rack for the case, but I got it anyway because of the rigidity compared to the stock rack. It's a nice piece and he'll even sell you some t-nuts to assist in attaching the case. Personally, I wouldn't even have tried to put the case on the stock rack.