When I was looking for on-wall speaker info online it was pretty tough. People came up with a couple of recommendations, but very few had heard them in rooms. I listened to what I could in stores, but again, there was not much selection and each store seemed to have one or two brands often in different rooms, making it tough to A/B.
The HSU Ventriloquist satellite system is one that I have seen recommended a number of times, and it is relatively inexpensive. Triad speakers were often recommended for on-walls, but I have not listened to them at all. There was a vienna acoustics speaker that I thought sounded pretty good, but I am not going to remember the model number off the top. I wound up with Gallo Reference AVs, but that is in a different price point than the speakers that you mentioned.
Good luck,
--Matt
