Sounds good. Weird that you received the 5.2s instead of the 6.2s. As others have mentioned, the only thing you will really gain is perhaps a bit more in the deep end. If your sub is handling the duties for music listening as well then you might not have any issue here.
Good to know that things are leaning towards the positive. One note, make sure you pick some good rock recordings. Some of the "lesser" recordings make me wish for a cheap pair of Cerwin Vegas where I can't tell the difference between a good and bad recording.