accommodation near airport or city center in Riga?

Hello,

from July I am moving to Riga for may be a year or two. I don't know exactly yet. Can you give me any advice or recommendation for neat accommodation? I am looking for something either in city center or any area nearby airport where all services, shops and restaurants available. Thank you if somebody is willing to help.

I just read some posts and may be I should add that I am intending to use the accommodation around 20days per months, however prefer long term rent with atleast two rooms in nice area.