The Sony projectors offer a lot of quality. Which is good, because I've generally heard that their support is not the best if you do have an issue. You want to keep in mind that the 50ES will offer a stellar image for the money, so any increase in price you are paying for the 95es will be for a very marginal improvement overall. This is entirely your choice, but I would not spend the money on that small improvement, but would save the money for a few years and spend it on a new projector in 5 years which is better than anything on the market today. Kind of like buying a top dollar PC today... in five years something half the price (or less) will outperform it in almost every manner.
Now, you are talking about a decent lit room, but we need to talk about the entire room. The Sony is a class of projector which puts a lot of burden on you for the image quality.
The room must have dark carpet.
The room must have dark walls and ceiling.
It doesn't have to be black, but black is preferred.
Darker is better, always use flat paint... no gloss to the paint at all. Not satin... Flat dark paint.
If that is to much to ask, then you won't get out of a 95ES or a 50ES what it can deliver because the room will destroy the on screen image.
Now, that said, if you want some lights on, you have to plan for those lights to be positioned away from the screen and be directional (ceiling cans).
Please see:
AV Integrated - Custom Audio Visual Integration In Washington DC Metropolitan Area
For a screen, once again I would tread carefully. The only way to do 2.35:1 properly is with a anamorphic lens. A good lens costs upwards of $1,000 and you will want it to be on a sled, maybe a motorized sled to move it in front of and away from the projector lens. This will give you proper aspect ratio 2.35 material on a 2.35 screen, and proper aspect for 1.78 material (16:9) on a 2.35 screen. But, since the aspect ratios don't match up, you will have black bars on the left/right of the screen.
You really do need the measurements of your room to make this decision. Anamorphic setups, done properly add thousands of dollars to your cost. Not a big deal for some, but expensive for others.
Beyond the cost of 2.35 setups, you have to look at your room...
Is the room wide enough to support a 2.35 screen and still give you enough size for a 1.78 image that is impactful?
Does it make more sense to just go with a 1.78 screen that is as wide as you want your 2.35 image to be?
Is the projector bright enough to support that size?
Will you need to go to an acoustically transparent screen to place speakers?
Are you prepared for the work involved with an acoustically transparent screen if you do go that route?
You will need to get everything planned out now. Prepare for dark surfaces everywhere - make the room a cave! Then light it up with plenty of zoned recessed lights that are dimmable. Sconces are pretty, but stupid in a theater. Rope lights under a raised platform are almost always improperly implemented. Stick with the basics for your theater lighting - put light above each location that needs it while the movie is on. Put separate lights above the rest of the space on a separate dimmer. Then add more accent lighting which will most often be off while the movie is playing anywhere else you want.