If you can afford it do an integrated course go for it, but why just look at only OATS? have you checked what the other Ab-Initio schools can offer?
They may offer something similar for less and at the end of the day I really don't think which school you went counts for a huge amount, despite what the marketing departments may want you to believe. As long as you have the requisite bits of paper and ticks in the boxes, from what I can gather talking those in the know, with the right personality and a huge amount of good luck you should be on the right track.