And welcome to our Forum.
It sounds to me you like have three fine options. I am guessing (though you should probably verify with the Inosanto Academy) that the Katipunan school is certified by my teacher, Guro Dan Inosanto. I love Guro Inosanto and would be nothing without him. Inosanto Blend is the dominant influence on DBMA and knowledge and training in it will serve you very well in DBMA.
Pekiti Tirisia is also a fine system. I am a member of the PT family and have trained with GT Gaje both in the US and at his home in the Philippines. The best fighter in the Dog Brothers, Eric "Top Dog" Knaus, was PT trained and PT is one of the three main FMA influences on DBMA. Because PT is an important influence on DBMA, a goodly portion of whatever PT you do learn will serve you well in DBMA.
Obviously I like DBMA too
As you may know, I was just in Buenos Aires for 4 days of training and was very pleased to see the work that Nicolas has been doing in person. Nico regularly sends me discs with footage of him teaching and his students training so I was not surprised in the slightest.
Also, while I was there Nico showed me some footage of him sparring in the Philippines with people of good level and doing quite well. His fighting movement showed fluidity, good technique, and very good results-- I was very pleased. During my time there I was able to do some good work with Nico and give him the next block of things for him to work on. I am confident he will continue to work well the material I give him. Nico is now authorized to start Training Groups throughout Argentina, Chile (we had some people from Chile at the seminar), and Uruguay.
Concerning sparring/fighting: The mission statement of DBMA is to "Walk as a warrior for all your days". The primary laboratory for the system is "Dog Brothers Real Contact Stickfighting" BUT MOST PEOPLE IN DBMA ARE "PRACTITIONERS", NOT FIGHTERS. There is no sense of someone being a "kitty" if they do not spar or fight. How far someone goes into that (from Action Flex sitcks, heavier protetive gear and various limiting rules all the way to DB type fighting) is simply a matter of what makes sense to each individual for himself. I would add that IMHO those who do not spar or fight benefit greatly from being around those who do-- it gives a valuable understanding of what the training is designed to do, especially when taught by a teacher with some experience such as Nicolas.
Does this help?
Guro Crafty Dog