I have always felt that Olgivys have a little too much thickness to them to do any good. My favorite things to use are just a regular Fleeceworks half pad and an Ultra Thinline pad or just splurge and get the Thinline half pad combo from Thinline.
The problem with ogilvys is it's memory foam so once you are sitting in the saddle it squishes all the way down then it doesn't have any give left. i have a lami cell I school in and a fleeceworks I show in.
Personally, I would never buy a saddle for a horse thay wasn't mine/wasn't leasing etc. Saddles are very expensive and fit each horse differently. It would be a waste of money in my opinion because the saddle might not fit the next horse you ride, especially if it's lesson horses as you might ride different ones each week! But it's up to you!