Speakers for a very large room?


Reader of posts for a few years but have not posted a serious question until now. Currently have McIntosh integrated tube amp with some old KEF speakers. While I enjoy it in my current setting, I am moving to a house where my listening room will be 30' x 40' x 10'. It has polished concrete floors. Sounds like a grocery store but it is not. I suspect I will need to change speakers but really have no clue where to start. I listen mostly to progressive rock but also anything in the same general area. I don't know where to start with such a room? I am at least 3 hours from any major city. I did experience Treo CTs once and to bright for my ears and Wilsons but did not care for the visual appearance though liked the sound better. It was a few years ago so can't better define what I liked.  Not a great resume of listening experience but it is what it is at this point. For some reason, which may be completely wrong, I am thinking electrostatic may work well in this setting. I could easily move them 5 feet out from the back wall but then again I really don't know what I am talking about. Any kind comments would be appreciated.

Rich
ricmci
Rich,
I'm sure you probably already know this but I'd get the listening room acoustics tackled first and take it from there. You might like what you already have.
Larry
Start with GIK acoustics. they give great advice, and have the best price / performance.
That will make your room match wiht a much wider range of speakers than you would otherwise.

Have you thought about some JBL studio monitors?
I also suggest taking the time to address the acoustics first. A move is a great time to do that, because there isn't anything there yet to get in the way. You can also run additional power to the room while it is convenient.

Planar magnetic and electrostatic speakers are definitely options given you have the ability to place them away from the walls. But you should also keep in mind your listening spot, to make sure you don't end up with a setup that you will need to be pushed too hard in order to reach the volumes you want at your seat.
Thank you Larry. I have considered that but I am not sure my SO will allow such a thing hung in the corners of the room. I think I can probably get away with some throw rugs. That is always the push-pull of this situation. If I can't do room treatments then I will have to upgrade speakers and/or consider room correction device. Maybe I will enjoy my current KEFs in my new home but thinking otherwise right now.
Thank you eric_squires. I was not familiar with JBL Studio Monitors until you gave your strong recommendation for them. I am sure they sound just fantastic in your set up. I only wish I could upgrade to that level of listening that you endorse.  Maybe one day I will be so lucky.  Thanks for your insight. We all should be so greatful to receive such well thought out replies.