Thyme often the path less traveled will get you the results you are after,
Borrow all the amps that you can and see if switching out the amp does what you want it to.
Many times we have seen a better match occuring with brand mixing than keeping all the same brand obviously it does depend on the gear.
It all comes down to what you are trying to accheive sonically.
Don't be cowed into thinking that an all anything system is going to necessarily be the ticket. Audio allows for experimentation and sometimes chaning one item, cable, power conditioning, cables etc will do it.
Dave and Troy
Audio Doctor NJ