RM100 and Gflex cab choice

[laxcdn]

Read a few threads about some cab choices, but I have heard a lot about the GFlex and have kinda wanted one for years, but couldn't find one. I have an Egnater Tourmaster 2x12 with the Celestion Custom 80's. I have bought a set of Warehouse Speaker Veteran 30's to try. So I saw a GFlex in another province and was considering having it shipped. I would like to get some more mid and bottom end in my tone so the Gflex sounds right. So if I got it, would I leave the stock speakers in it or switch for the Veteran's? Thx for any help.