Here are the top 4 hotels in the Woodbridge area according to TripAdvisor:
http://www.tripadvisor.co.uk/Hotels-g186387-Woodbridge_Suffolk_East_Anglia_England-Hotels.html
What I know of those is as follows:
The Crown is a very traditional 'centre of town' hotel, with a good reputation locally, in the heart of Woodbridge itself. The food is meant to be very good.
Seckford Hall is a couple of miles out from central Woodbridge, on the Ipswich side. It's one of the most popular wedding locations in the area. (My cousin had his wedding reception there).
Ufford Park Hotel is far more modern, with its emphasis on leisure activities (such as its spa and golf course). It's well outside Woodbridge, on the northern side.
What TripAdvisor calls Wood Hall Hotel and Country Club appears to be Woodhall Manor, which now seems to be available mainly (solely?) as a wedding and function venue (with accommodation for those who are attending those events). I've never heard of it myself.
Out of the Woodbridge area hotels, my own choice would be to opt for the Crown, simply because you can step outside the door and explore the shops, bistros, heritage and countryside straight way, without needing to take the car.
Here are TripAdvisor's 'best 5' hotels up the road around Aldeburgh:
http://www.tripadvisor.co.uk/Hotels-g186382-Aldeburgh_Suffolk_East_Anglia_England-Hotels.html
I know little about any of those except that the Brudenell is right by the beach in Aldeburgh, so offering excellent opportunities for walking and exploring the town. However it does have a bit of a reputation for employing lots of unskilled, low-paid foreign workers, who might not be particularly well-versed in providing excellent customer service. The White Lion and the Wentworth also well-located in Aldeburgh, so might offer better bets.
The Angel Hotel in Halesworth has a good reputation locally. It's a centrally-located traditional coaching inn in pleasant little town.
Here's TripAdvisor's 'top 5' hotels for Southwold:
http://www.tripadvisor.co.uk/Hotels-g503753-Southwold_Suffolk_East_Anglia_England-Hotels.html
I know nothing about any of them except that the Randolph has a very good reputation locally.
After all that lot though, if you asked me where I'd really want to stay in that area, it would have to be where you can find the best food in the whole of East Anglia. (I'm told that the accommodation is excellent too!):
http://www.westletoncrown.co.uk/