Lovely system, Audiowoman! I used to own the 2CE's. Are you seeking more detail, more clarity when you say, "Dealer has recommended updating cabling in this system to bring more energy to it."? i.e. were you suggesting you would like more energy?
If so, there are couple things you can do; some cheap, the others more costly.
Cheaper: Bi-wire the speakers. Use double runs of cabling to the inputs of the speakers. I only see one very thin speaker cable; it may be single pair of leads L/R at the amp and doubled at each speaker. If so, Kudos, you already are taking advantage of this option, which in my experience has never failed to add "energy" and vitality to speakers offering it. However, this is not as effective at changing the sound as changing components or speakers. If you only have one pair of L/R leads for each speaker and are using jumpers to take the signal from one input on the back of the speaker to the other, then definitely you'd benefit from bi-wiring. Your dealer can explain it to you further, or you can do a search on the Net.
Very cheap: I felt the low end had a bit too much bloom/bloat at the time I had the 2CE (different rig, different room). To eliminate some of that low end overhang I placed sound absorbent material behind the speaker about 1 foot away (you might also try larger pillows initially for experimentation); this absorbed some of the bloat and allowed the mid/highs to shine a bit more. Very economical and might do the trick!
More costly: I hate to say it, but you may like a "brighter" and leaner sounding speaker than the Vandy. Vandy's are very laid back, smooth, warm and somewhat syrupy. If you want more snap, forwardness, detail, etc. you likely will have to change speakers to get the level of those qualities you want.
If you really like the tonality of the Vandy and just want more "oomph" then possibly move up on the power of the amp. Maybe your dealer can loan you an amp with higher power to let you experience it in your system. You'll likely be impressed at the difference it makes.
Hopefully, if your sound is in need of tweaking the more cost-efficient answers will help! :)
