budget power options

Hi all,
I need some guidance to better power my Amphion Argon 3's. I currently have a Peachtree decco65 which I like for the flexibility to play multiple formats, but I have a feeling it's a bit underpowered. Room is 10'x14' and the speakers are on Sound Anchors stands, the speakers sound lovely but I'm not so sure I'm getting as much as I could with my current integrated. Does it make good sense to add a power amp to the Decco65 like a Parasound a23 or other nicely priced amp and utilize the pre of the Peachtree, or do I just replace it with something like a current Hegel 160. Thanks for the help.