Depends on what your wallet and patience is like...
1UP has the holy grail of cab design...( everytime i see it, it blows my mind...)
I did mine with blk paint, and eventually I am going to place an instruction chart on the bottom of my bezel (probley vinyl)....
Matte board is a little bit spendy( where i'm at )...then you have to take the time to make sure the measurements are straight and have a way to have it stay in place and yada, yada, yada...and when you are drinking beers and operating power tools, you kinda forget things and misplace priorities...(LOL)
The point is that its really up to you, how you want your cab to look...dont over engineer...your main goal is that you are wanting to hide what is behind the glass... Make the cab that you always wanted... 9 out of 10 people who come to play wont even care what type of bezel you may have....