I own a pair of Enzo XL's.
I upgraded the tweeter to a BE tweeters with as close to the original spec'd speaker as I could find. It was actually a "drop in" replacement. About $300 each, if memory serves.
Despite the 2 ten inch woofers, I would not categorize the Enzo's as "bass heavy", and used a sub with them.
I'm glad you're enjoying your speakers.
I've since moved up in the food chain to a pair of open baffle speakers (not Tekton), but still have the Enzo's sitting there. Not a bad speaker for the price, but they can't hold a candle to the open baffle speakers (which, at a MSRP of $10K, is completely understandable).
I ran mine with a Classe CA2200 and Classe CP800, so 200wpc. Sources were pretty exclusively CD players.
Mine took a long time to break in, so be patient with them.