Purely on matchups... assuming each team is 100% healthy..
Golden State IMO can beat all of them
Memphis wouldn't stand a chance against Cleveland or Chicago IMO. They're tough but beatable.
Houston is interesting...They can beat any team in the east, but the Hawks defensively could slow them as well as Chicago.
Portland is beatable by many teams in the East
LA Clippers are beatable by Atlanta, Chicago, Cleveland
Dallas has been worse with Rondo, so I don't know if they have a chemistry issue or what
San Antonio has not been that great this year... but I still think they could beat any team in the East.
OKC can beat any team in the East when healthy.
There's only 3 teams I mentioned consistently in the East. IMO Toronto, Washington, Milwaukee, Miami, Indiana ain't doing shit.