I have an MS na VGT. Ride quality ok lang. Di naman masyado matagtag. Tingin mas comfortable ng konti ang ride ng innova. Single or family man? If you are single, get the MS. Medyo mas looker sya compared sa other choices mo. Magandang pangchicks.

Medyo mabigat lang ang steering nya.

Medyo sanayan lang din yung seating position nya. First time na naglong drive ako using my MS medyo nangalay ang likod ko.
As for the 3rd row space, ok lang sya (not unless 6 footers ang sasakay sa likod). May family finds my MS' 3rd seat more comforable and spacious compared to my cousin's fort. Not my opinion since di naman ako nasakay sa 3rd row.
Power: More than enough ang power ng MS specially MT ang kukunin mo. Just fill it up with euro 4 or euro 3 diesel para maiwasan mag emit ng black smoke.
FC: 7 km/l on short city drives and 11 km/l on long high way drives.
Cant say about the other MPV's since I havent driven them. Although nakasakay na ko sa innova. I'd say its between Innova and Montero. Unless you might want to stretch out your budget a bit and get a Kia Sportage
HTH