Jolida as a DAC/source is actually very nice for the money. It is not the highest resolution device, but the sound is very natural and it does have excellent response for a tube device. Recommend you get some Electro-Harmonix 12AX7 tubes if you choose the Jolida. Also, throw in a very fast/strong fuse like a Synergistic SR20 or a Furutech and a high-current power cord. These are things that will make the Jolida excellent.
I know Eric loves to recommend the Zdac for the money. I have not heard it. Could be good as a pre-driver for your Jolida integrated.
Musical Fidelity V90 DAC has a wall-wart power supply so I would avoid that unless you got an upgraded linear power supply module.
Schitt audio has had a lot of good comments, but I have no idea how it sounds in relation to other conventional DACs. I might choose the Shitt over the Zdac, based on how I see their approach to circuit design.