The Dynasty Grande on Soi 6 is decent. Don't mix it up with the other, cheaper Dynasty Inn on Soi 4 (Nana) that markets to a different clientele. Also on Soi 6 across the street from the Dynasty Grande are Phachara Suites. I used to stay there with a friend when it was regular long-stay apartments (very nice ones) but a couple of years ago the building was completely repurposed and renovated into hotel suites. Haven't been in since the re-do but looks pretty nice.