Amp or speaker first, upgrade


Hello audiogoners, it's the Brahman on a beer budget with an upgrade dilemma.
I currently have a Krell s300i, a pair of Definitive technology bp8080 as my system.
Now, I want to upgrade both but, one at a time and was wondering which of the two 
components should I dispense with first?
Here are the amps I've been looking to audition, Icon Audio st40 mkiiim, Luxman 505ux, McIntosh Ma5200
and Prima Luna Dialogue Premium. As you can see there is a solid state in the bunch.
As for speakers, I'm interested in the Vandersteens 3a signature, the Sonus Faber Venere S, and the 
Wharfdale Jade 7. I know this topic has been brought before so I'll welcome some new and refreshing
ideas and comments! Thanks a bunch Audiogoners!

barbman
Just want to let the audiogoners that responded to my questions, I respect every reply, suggestions, ideas and so forth. I put all these ideas in a large audio pot and see what comes out that most agree on. Well I'm gonna keep my trusty Krell amp and sell my Definitive Technology speakers and pull the trigger on a pair of Vandersteen 3a signature!
As one audiogoner suggested, I can upgrade the amp later down the road?
Hey guys remember, let's not get caught up to much in the hardware otherwise we'll never enjoy the software, the music we cherish and love!
Thanks again guys, enjoy the music!
Regards, barbman

Way to go!
I, too, have the Vandy 3a sigs. I remembered listening to the original 2's back in the early 80's, and after a 30 year hiatus, I finally got back into hifi. I have to say the Vandersteens have met and exceeded all my expectations. Enjoy. Should you need any help in setup, contact JohnnyR on Agon(Audioconnections, I believe). Mr. V will also answer your questions personally, but he can be a bit brusque.
Bob