Sinclair house is slightly cheaper than the main hall I believe and you don't have to pay for healting and electricity...however you do have to buy your own toilet roll whereas the main hall gets it provided :O
It's quite a lot smaller room wise in sinclair, especially when compared with the houses but it's still cosy and you can (fairly) comfortably sleep 3 people in there. Beds are quite small though...if you want wider beds go to Hiatt Baker but that, in my opinion anyway, is a bit of an ugly hall and prisn-like at times. By far the best hall here is Badock. We have the bar with the best atmosphere and it also has the benefit of being the cheapest! There are some truely great people here and the rooms are comfortably large, being much bigger than many people's rooms at home! It's worth considering the walk from Stoke Bishop which after about a term you can get down to 30mins but it is literally 5mins from Manor to the University Precinct and you're close to all the bars and clubs on Park Street and the Waterfront, and the ice skating rink is not too far away either. It definately has the advantage of location...but I'd still go for Badock if I was gonna stay in halls next year!