Well, if he says Jotun is just so so quality, then ask him is it MPM is the best quality paint around town? Yes, practically every person working in MPM is experienced and almost all also from ICI Dulux before moving to MPM because even the boss of this company is the one previously working in in ICI Dulux as the National Decorative Manager who retired a few year backs before starting MPM.

There are a few ways to determine whether MPM is better than Jotun or even KCC, Colourland and others.

Firstly, MPM is made by PAR Kansai Paint. You can ask him to show you the can and look at the back where they will write manufactured by whosoever..
Secondly, it is only 4.5L which means less 10% from those 5L.

Thirdly, if MPM's paint is made by PAR Kansai, the paint will be second grade paint. It's very simple. If you are the boss of PAR Kansai and MPM approach you to ask you to make the paint for them, will you give them the first grade paint? If you give them the first grade paint, then how are you going to survive in the market when MPM's marketing strategy is much better than yours? So, you'll automatically give MPM the 2nd grade paint. Am I not right?
And furthermore, PAR Kansai Paint has their own second grade paint called the Goody Paint selling at a much lower price than MPM's..
A few months back, those Kansai Paint's men came out and said that why are the people buying MPM when their Goody has the same quality at a lower price. Now, MPM is in the midst of setting up their own factory.

And also price vs quality..
Ask your friend how much is the MPM selling and compare to others 5L. Add 10% of the price and see if MPM paint is really cheap. And the quality, ask him how good is it..

Ask him to show you some color books(not those catalogue but the color books that show you pictures). Maybe that will give you inspiration.

Personally, I would like the feature wall(the wall behind your bed) to be in a slightly darker colour than the rest of the walls in the room.