lacp on multiple switches

+------------------+   first cable
| switch core 1 |------------
+------------------+            +
                                      +  single  +-------------+
                                      +------------| switch N  |
                                      +   lacp    +-------------+
+------------------+            +
| switch core 2 |------------
+------------------+    second cable

I desire a situation like the above, where the "remote" switch has one lacp (two ports) and each cable connects to the core switches in which we configure a single lacp on each switch. I think that we need to use two core switches that support trunking (sees as one logical unit), is it correct? some suggestion on models that support this? now we use dell 5224 as core switches and I see that 6224/6248 support that configuration, correct?

thanks