Hi Miguel , I own 4 titans , and I think that they are great for what you want to use them ,I used to own EAW LA-400's and I sold them after building my first pair of titans ; compare with the EAW's I think they are a little bit more musical , they have a lot of punch on the 60-70hz region , however if you want to go low , you may want to build the tubas , the titans are good in the 35hz to 90hz frequencies , but under 35hz , they start to fall noticeable , I also like how they pack in my truck being 24" X 24" X 48" they fit really good , and also is a good height to stack your tops. that was also one of my main reasons to replace my EAW with these ones.
I used two of them yesterday in a party for 250 people and they perform quite good ,4 of them would probably have been too much.
The build is a little bit complicated ; I have been a cabinet maker for 12 years and I had all the right tools to work on these subwoofers , and still i think it would be hard for a person with no experience in woodworking.
anyway have fun if you decide to build the titans.
here are couple pictures of them.