I've been wanting to pick up a Dot. I have an original Echo right now, and while I love the device's capabilities, the sound quality from the built-in speaker leaves a lot to be desired. I have a pair of KRK Rokit 8s that have been busy gathering dust in a closet since I upgraded form those to my Elac Uni-Fis, I bet those would make a nice bedroom sound system paired up to the Dot.
HT: Sony 940C, Oppo 203, Harman/Kardon DPR1001, Infinity Interlude IL40 x2, Infinity Interlude IL36C, Infinity MS-1 ii x2, Infinity MSW-1
Computer: Elac Uni-Fi UB5 x2, Elac Element EA101EQ integrated amp, SVS SB-12NSD
Dedicated 2-channel: Infinity Intermezzo 4.1t towers, Bluesound Node 2, Emotiva PT-100, Crown XLS 1502, Furman PL-8C