I've personally owned the TT Tsunami Dream, the Antec Lanboy and I have a Lian Li case (Lian Li's are all pretty much the same just the size varies on some models).
TT Tsunami Dream- An alright case, nice looking, heavier then I thought it was going to be and not all that much room.  All and all a decent case for airflow and has some nice mods prebuilt into it.
Antec Lanboy- My first case, I upgraded to the above case because I wanted to OC and have a larger case that could move more air.
Lian Li- (I personally own a PC-65, but wanted to get a PC-75 because of how much room it has!)  My third case after the above two, I like the looks of it better then the two above, clean cut, sleak design, very eye appealing.  Case airflow is actually better then what I thought it would be.  The fans that come with it are quieter then both the cases and my temps for an OC were actually a few degrees lower.  All in all this is my favorite case and I don't see me getting a new one anytime in the next 2-3 years.