I actually have a two questions. 1. i am looking into eventually buying the m&k s-150 or the m&k sw-150's. I recently purchased a used b&k 307 receiver with 150w per channel. will this even run these speakers or will I have to get a pre- amp and amp since they are 4 ohm speakers?the receiver i bought used does not say the ohm level on back. I would like to get the in wall150's but i do not know if they would sound better than the enclosed standard 150's. I have also heard that the new m&k's do not sound better than the old thx cert. ones. second, If i end up going with the standard s-150's does m&k sell wall mounts to mount them on to my walls? I know a lot has changed with the company shifts with ken going solo. but i would really like a mounting kit. Here is a even funnier note. my listening distance from couch to speakers is about 20 feet! I was hoping that the 3 s-150's would be sufficient but I might of messed up by buying this b&K component receiver. thanks for reading and a possible response!