Given the quality of your speakers. I would consider investing in one or two components at a time and raising your investment level. I would recommend either spending your current budget on a preamp or on an integrated amp. You will get a big improvement in sound quality. Then after a year or two, consider purchasing an amp (if you had purchased just a preamp), or a high quality DAC.... and finally the year after a high quality streamer.
My rule of thumb is that you want to invest in your components about 15 - 20% of the value of your whole system. So speakers around 30% and each component about 15%... preamp, amp, DAC, and streamer.
Long term it is cheaper to do one component at a time as opposed to small increments of increase to all components at once. You still enjoy each upgrade, but when you are done you have a synergistic fully realized system. You can concentrate on each component exclusively and carefully choose your tuning of the sound as you go.
Anyway, consider this classic audiophile process to upgrade.

