Yes. Speakers ultimately determine the sound of your system and these speakers, particlarly with the floorstanders, will be a quantum step up from what you currently have. They will go well with a better receiver in the future but still sound great now.
Now, you can save up for a better receiver as your next upgrade, and these get better and cheaper every year. Waiting on these is not a bad thing.
Then you could go for a sub, which will probably be the biggest expenditure in your syste, With these, the eneral ruls is the more you spend, the more sub you get.
Or, go for the sub next if you like the sound of your current receiver with these speakers. This would not be a surprising discovery. Your receiver may not have all the bells and whistles of te newest stuff, but it does cover all the bases for pretty good sound.