I got gold on all 3 using a sixaxis (no glitching).
Monza: Very doable, took me 30 minutes for gold. It's all about nailing the 2nd chicane.
Lap 1: 1:03.2xx Lap 2: 0:59.5xx
Total time: 2:02.7xx
Nurburgring GP/F: Again, doable but extremly hard. It's not hard to do gold-worthy laps but it's hard to do 2 in a row. Took me 5 days.
Lap 1: 1:03.2xx Lap 2: 1:04.5xx
Total time: 2:07.7xx
Suzuka: [After doing the Nurburging] Very doable, took me 2 hours. I suggest you leave this for last, because by the time you gold Monza and Nurburgring - you'll be pretty amazing with X2010 so Suzuka won't be a problem!
Lap 1: 1:05.3xx Lap 2: 1:04.6xx
Total time: 2:09.9xx
My settings:
Manual transmission, SRF [on], ABS 1, brake balance 10/10, controller sensitivity 7 and chase camera.
It's very doable with a pad but very hard at the same time.