It might be worth waiting for a new pair of speakers, but a good pair of second hand BL4000s is definitely worth it. And when conpare to BL4s, a handsdown winner all the time!

I just went into my dealer and listened to the 4000's, and WOW! I know what I am saving up for lol. 

Judging by your comments, I am guessing you want some speakers which can move some real air!

I'd recommend a pair of used Pentas or 3's budget permitting as a starting point (I know the pentas are old), rather than 4000s, with a view to upgrading to say Beolab 8000/Beolab 3 & Beolab 2 at a later date. 

If you like loud music and/or bass - The 4000s and (even more so) the 4s won't cut it to be perfectly honest!

Having both the 4 and the 4000, for what you want, I'd say go for a pair of second-hand 4000s, they'll be better than the new ones with ICE Power amps, and better than the 4s as well, if space is not an issue. Moreover they come with wall brackets and are very flexible when it comes to placement.

I use my BeoLab 4 as PC speakers at work, and for that purpose, they are great for me. At home they were once used as rear speakers in a 5.1 setup; I wouldn't use them for something else.😕

Wall mount 4000s and they have plenty of bass. They are very flexible speakers - when you go round Struer, you will see 4000s all over the place.