I agree that the commute from some areas can be a pain. Bury is getting very clogged now; we spent fifteen minutes stuck on Parkway down to the Southgate double roundabouts today. Any journey that can avoid main roads helps.
Thetford to Bury does get clogged up and the road is quite narrow along the A roads and busy along the dual carriageway. What are the back roads like POTC?
The route from Bury to Sudbury gets a tad congested along Sicklesmere Road as you hit the town limits but you can turn off at Hawstead/Nowton Park, use the back roads and come out at the roundabout that takes you up past the hospital- but this still gets busy because of the schools nearby and hospital bound traffic.
Fact is you won't be able to avoid the jams unless your working hours are non traditional and avoid the school run. Bury does have lovely schools though. We are lucky in that although we will be affected by the transition from three tier to two tier.
Small villages like Risby, Barrow, Gt Barton, Saxham, Lidgate, Sturmer, Hartest, Newton Le Willows, Gedding can be quite pricey BUT you can also find some gems if you are prepared to travel a bit. I would also suggest Felsham, Gt Welnetham, Cockfield, Little Welnetham, Brockley Green, Hawkedon (on the edge of your mileage), Stanton and Rougham.