My builder put in Sonance in-ceiling speakers for my whole house audio. I have them in the study, dining room, bathrooms, bedrooms. They seem to be fine speakers for background noise, but there certainly is no bass effect to speak of. I installed in-wall/ceiling speakers for my HT room. I chose Speakercraft mostly because the price fit within my budget and I was able to listen to them driven by the Receiver I bought. The speakers certainly sound "ok", but a sub really is required. Several Mfr's make in-ceiling subs so you should investigate that for rooms that you really want to have the bass (Speakercraft does). PM if you want to discuss more.
Alien, I have not seen if you have a separate post (I saw the one in Projectors), but for your new HT room, be certain to run 2" PVC conduit to allow the ability to pull new/different cables in the future. I did not have a DVI cable installed initially and just got lucky that I was able to pull it myself to the projector.