Admranger, just the overall bass in general is very good and clean. The heartbeats get a little carried away but is very clean and will test your amp and how well it can control the speakers low end. This will also test your room and let you know if your room is putting out unwanted frequencies. I think they increased the db's on the heartbeat so if you can control those beats you can just about control anything.
There are test track cd's out there that can help with bass management. I have the XRCD24 bit Sheffield drum test disc which is great for bass management.
Lately I have been spinning the DVD-A of Talking Heads Speaking in Tongues and Dire Straits SACD of BIA.
If you like Talking Heads the DVD-A 5.1 mixes are a lot of fun and done very well and I'm not much into mixes.
Again, I think these discs have bass that is very well done with a little more detail and clarity going to Dire Straits SACD.