Charles,
The tonality and timbre, naturalness are there, again, read the various reviews. Both Tim Smith and Scott Hull are thorough reviewers and speak plain truths as I know it with the Tektons.
Grannyring, I played bass guitar during the 60s Rock era, and unless you want to damage yours ears, a quality 8-20 watt SET tube unit in a 14x16 room with a well designed and implemented high efficiency speaker such as the Tekton and others will rock the room. If you want stadium Rock, to fill The Boston Tea Party venue or Fillmore East/West then you might want something else. Remember, RebbiÂs room is something like 11x10. What's your goal? Animal house, or musicality in a small room? But also remember that large movie venues were filled with sound using old, low powered Western Electric amps.
Rebbi, Eric Alexander is a special designer/builder. His Tekton likely would suit you. My brother has the DeCapo's (your model) as well as Harbeth HL5. I've listened to a number of Omega's, nice workmanship, but to my ears not up to the Tekton, hence, I purchased the Tekton 4.5. I hate to keep banging the Tekton drum, but they are outstanding, especially at their price points, but don't let their price points fool you, they play with the big boys, and better than many.
Mapman, I don't recall ever hearing Tuetons; but I did love your old employer's place, Tech Hifi in Paramus, NJ. That is where I met John Rutan for the first time. As you probably know, John owns a great brick and mortar in Verona, NJ. I like to think of him as "The Gentleman of Verona". John, early on, helped me make some good musical choices. One of the good guys in the trade.