Merlin speakers a new start for me

hi folks.... Long time audiogoner and have not used the form a great deal. I am in mid change over from a home Theater setup to a two channel system. The basic problem is space. Running two systems did not work so I combined what I had and have been running 2 channel.

At the moment I am sort of between systems but what is left includes.

Preamp Classe 5L
Amps Pair Threshold T-200's (Both have been updated by Jon S)
CD is the Dennon 2900
TT is a project
Speakers at the moment are a pair of Revel M-20's
Revel B15
I have a S-30 and a pair of older Paradigm ADP surrounds that are not in use
I also have an older Sherbourn 5/1500 left over from the HT.

My thought at the moment is to keep most of what I have and simply add a hi end pair of monitors, or speakers somewhere between 2-5k. I have been bouncing around between

Merlin VMS M or SE
Merlin TSM
Revel Gems
Thiel 3.6 the 2.4 or even the 6
ATC 20's or 50's

I have been a long term fan of Celestions and had either a pair of the SL-600's or the 700SE's for the past 15 years. So I am both a big fan of a clean image and or a very very good sound stage both of which I got from the Clestions. At this point, I simply feel the Celestions are too old to be reliable.... and I would like something new. The room I am in is moderate in size and has a very very bad suck out around 50hrz so the speakers will likely be used with the Revel handling everything from say 60-80hrz down.

Thought I would ask the form espcially those that know and have heard the merlins. My plan at this point is to keep the Classe/Threholds and the Revel B15. I am not really attached to any of it at the moment as I am not getting all that I think the system can offer.... so any suggestions welcome.

Thanks