As Paul Harvey would say, "now the rest of the story." Well after working closely with Revel's customer service and shipping department I received another pair of F208s today. My first pair weren't properly sealed and never sounded right. I conducted a series of test and Revel agreed to send me a new pair. I really didn't expect much, but right out of the box I knew something was different. Wow! Much more natural, not loud at all, definitely more air. If they don't change at all, I can truly say that I'm finally elated with my decision to sell the F52s. Should I expect any changes? Looking for suggestions on amplifiers...Amir are you out there?
Congrats on your F208.
I own the Studio2 and have some thoughts about placement and upgrades. The Studio2s (and likely the F208) are not fussy about placement but will reward careful placement and room treatment. In my room (13' x 24'), the Studio2s like to be about 4' from the front wall with a small amount of toe-in. Spikes are essential, and after-market footers are even better (eg. Stillpoints Ultra SS).
Since the F208 and Studio2 have bass response below 40Hz, it's worthwhile to consider bass traps and/or panels. The Studio2s have excellent Beryllium tweeters with good dispersion. The extended treble response got better with a combination of absorption and diffusion, not necessarily at the 1st reflection points.
In terms of upgrades, the Studio2 will provide slightly better bass and more extended treble. For example, the glockenspiel on Beck's Sea Change is remarkably clean and realistic. The cabinet is also rigid and quiet. I considered the Salon2 but it's too large for most rooms (including mine), and the deeper bass response requires a really good acoustics.
The Revels are not power hungry, but are good enough to highlight improvements in amplification. I currently use the Pass X250.5 and it doesn't break sweat driving the Studio2. It's a fantastic combo. To get to the next level, I'm looking at the new Pass X250.8 or Audio Research Ref 75.