The ML33H's are excellent but I always found them a bit thin sounding in a friends system no matter what speakers he used. If you've been listening to tubes you'll notice this more than others. I'd consider top of the line Revel's or B&W's.
The Ref3 I owned had decent bass extension but no mater what components I connected to it, I wouldn't say they had good bass slam.
The Ref3 I owned had decent bass extension but no mater what components I connected to it, I wouldn't say they had good bass slam.