I recently acquired a Leupold LRT 8-25x. Yes, it has a 30mm tube, but be aware that the outside objective is 58mm, while the outside objective of the Leupold "40mm" 8-25 is 51mm. That only .275" greater.
And, if you use the Burris signature "high" model, the lift isn't too much. The 30mm Burris...