Thanks for your advise. I think I can try the Q models, I dont have option to try the WH where I live
I think I am missing something.
Are the deals you mention as all available from the same store? If so, why can you only test one brand.
You said the Evo pushes the price up, I take it you meen over your budget, and not that all the others come in the same package price. I don't think you have mentioned where you are. Below is (according to a quick Google) a list of the price of the speakers you have listed.
Q3030i £250
Wharfedale Diamond 12.1 £250
Wharfedale Diamond 12.2 £300
Q5020 £480
Dali Oberon 3 £500
Whaferdale Evo 4.2 £650
All speakers (all equipment) is a compromise, nothing is perfect. Having said that, the speakers that best fit the description of your room size and speaker placement are the Evo 4.2. All the others probably need more room at the rear than you are able to give them. That isn't to say they are the speakers for you. Tonelly they may not be to your taste.
You started by asking for speakers to match your chossen amp. Providing the specs work, it's more important to pick one to match your room and your ears.