Hi Acalex
I quite understand your issue of dialogue vs. effects using a stereo system, something I did for many years. My solution was to keep AV and stereo playback separate and I’m very happy with the results.
(I use MA Radius One below the TV plus a MA Radius R370HD sub plus R90HD rears, but have kept my stereo speakers. Currently using them through zone 2 of the AV receiver with the eventual plan to drive them with a Naim Unitilite or similar).
To keep your box count down and (just) within budget, could this be an option for you?...
3 x wall-mounted Neat iota’s (they’re VERY small and would not dominate any room visually), an AV receiver (there are some excellent deals on Yamaha A1010’s / A2010’s at the moment), separate blu-ray player (I know this wasn’t what your original post asked for, but most blurays are extremely slim) and a sub-woofer.
I reckon if you purchased from one place you’d just about get this within the £2K (usually you’d get a decent package deal discount). List prices would be £950 ish for the Neat iota’s, allow £600 for AV receiver, £200 for bluray £350 for Sub. Again with package discount, you may be able to look at a more expensive sub / bluray. Your dealer would probably be dictated by where you can find the Neat iota's.
Also from my own experience, even with the technical wizardry of an AV receiver, you’ll STILL find yourself turning volume up and down at times to cope with the way some blurays are mastered. Listening to some mixes in pure direct (without any dialogue enhancement) is a joke. But with some tweaking with the settings I’ve eventually found a decent balance, and keeping it all separate from the stereo setup, IMO is a simpler approach. It’s not for everyone, but it could be something to consider.
All the best with your dilemma!