As you may know there are 4 raddison in Riga.
Aviod daugaba! it will be pain to stay at Daugaba if you're tourist.
Except that all 3hotels are very close each other.
Latvija is largest so you can expect gym, restaurant, casino, etc but some times it is too crowded.
both of others are not huge but middle size so less crowded and expect more friendly & efficient service.