I’m sure the Elacs are descent speakers and a better amp should make them sound their best. Just be careful what you choose so that it doesn’t limit your speaker choice down the road. Not knowing what speakers you would consider I would stick with something fairly powerful so don’t limit your choices down the road.
On the other hand if you buy used and buy right then no worries. You can always get back what you have in it and move on to something else. Krell K300i would be another on my shortlist.