Sorry to tell you this but you will have to spend much more money than this if you want the "best sound possible". These are really at the very low end. What is your budget?
Yeah, maybe you're right, Why talk about the price? Talk about the stuff, I can spend 2000 USD at worst (1500 EUR), so what d'you think, could I get something for this price??
There's a bunch you could get at that level. My pick would be (and was) Dynaudio BM6a or BM6a. Other options include Adam A7s (though subjectively I didn't like them). Genelec 8030/40s are another option.
Also I should have mentioned (and I guess you didn't actually mean 'mastering') these are still low end in big studio terms and v low end when it comes to mastering circles but if what you are looking for is for better pro-sumer end gear for mixing/mastering yourself these will do a good job for you. I wouldnt go below this stuff though.