Cant find details of fan noise levels published for this model - believe the old PTAE2000 was 22Db - not bad but not the best. It would be audible during quiet passages but not massively so.
The Sanyo and Mits at 19db even quieter.
My Mits is also above back seating position (3ft or so) and barely noticable.
Sanyo Z3 it replaced (22db) again similar so dont expect it will be an issue. for you with the Panasonic in low lamp mode.
Have a search around for offers (sound and vision sometimes price match)
Saw the PTAE3000 offered with free Blu-ray player
https://www.forumhifivisual.co.uk/Vi...3000_2254.html
Screen in all dark room - read some of the screen reviews on projector reviews.com for some advice - as always all depends on how much you want to spend.
For all dark room go for 1.0 gain - grayer material better blacks. Less reflection of course means lower brightness. Not a problem in a dark room - (always have my PJ on low lamp mode which means its running at its quietest as well and lamp lasts longer).
Everyone has an opinion and you can go massively into the "science" and tie yourself in knots. At the end of the day its what your happy with against cost/what you can afford.
Again search these forums for comments on screens. Manual screen suits me fine as its down all the time and lays flat. May be worth getting decent manual screen then upgrade at a later date to tab tensioned or fixed screen if you fell you need to. The heavier the material the flatter it should lie.
Beamax R series will suit
Projection screens
or heavier material Grandview screens
Manual Pull down screens, projection screens, Projector screens
As I say - at the end of the day its what your happy with against cost/what you can afford. Those with more experience or industry background may have better suggestions for you. Dont spend to much time looking for issues - set it up sit down and enjoy.
Good luck