Should I Upgrade from an Edge G8 amp to the Edge NL-12 amp??


I have an Edge system now with an Edge G2 preamp and Edge G8 amp. I like it, it’s detailed & resolving, but just not in love with it. It doesn’t seem to have the punch in the speakers I thought the pair would produce. Maybe it’s cabling or source, or speakers. I was considering a power upgrade to the Edge NL-12 to improve on it. Any thoughts pro or con? Or could I do better going in a different direction. I'm open to all suggestions.

Thanks.


EDIT: This is for a secondary system in a 15x22’ room.

Ag insider logo xs@2x3zub
3zub it would really help to know what your speakers are and what you mean by punch? Lacking bass? Or dynamics? Or something else?
Dynamics & punch is probably be the best description. (Sorry, don't have a better description.)  I've rotated between the Totem Forest, Monitor Audio GS10 bookshelf and Aerial Acoustic 5B bookshelf.  So far the Aerials seem the liveliest of the group with the Edge equipment.  They all produce different degrees of bass, with the Aerial producing a surprising amount given the sealed design. 
Looked up your amp and saw a review by Jason Victor Serinus which had the following conclusion:

In a forthcoming revisit to Wireworld and Harmonic Tech interconnects, I shall address in some detail the influence of cables on sound and overall presentation. What is important to say now is that the Edge G8 is an amp for which choice of cabling is a crucial and decisive factor.

When paired with the right cables, the Edge G8 emerges as a fast, powerful amp with excellent bass control, significant detail, and striking highs. Though not a statement product, it offers an enviable degree of musicality that makes it a definite contender for anyone considering power amplifiers in this price range.

Here is the link to the full review complete with measurements:

http://hometheaterhifi.com/volume_11_3/edge-g8-amplifier-8-2004.html

Without reading the whole thing I would ask what cables you are using as it seems this may be an issue with your particular amp.