I never had any trouble with grass like that when cutting it down to 3.25". I rarely mow at full sticks. Mainly at about 6-7 mph, and at that speed it always impressed me what it would really do. I went from the OEM medium lifts that come on them, to the OEM high lifts and it made a big difference. Then I switched to the G6's and they really shine under that deck. Once the engine gets broken in good, it will feel even stronger.
I would say to demo it if you can before you buy, but if they won't let you, I still think you'd be pretty happy with it overall.