The Sony SS-MF550H speakers sound good for the price but here are some opinions/suggestions.
They have accentuated bass around 45-85 Hz, try to use on carpet not hardwood, if it is still to much for you, use acoustic foam to partially plug the port.
They don't have a very flat frequency response, an equilizer is a must (should be built in to the reciever) an high quality external one would be better.
The highs sound compressed at louder volumes especially if they are underpowered, I used an crappy integrated amp with them for awhile and the highs would give you headaches, they sound much better with a more robust amp.
They don't have good off-axis response, so to get them to image well, you have to angle them in towards you alot. (but this narrows the soundstage, and makes the sweet spot smaller)
Driver excursion can be quite a lot in some of the lower frequencies, to the point that at louder volumes they could bottom out and damage the speakers.
I am only pointing out the negative here, they do have very nice sound compared to price. I still have a pair I use in my workshop.
I don't have experience with any of the other stuff. Sorry.