Re: CMT-340 owner looking to upgrade to Sierra Towers or Sierra 2EX
When I visited Ascend last year, I got to A/B the RAAL Towers and the S2-EX. If you have the room size and the budget, the Towers are definitely the better speaker. While the S2-EX is a truly impressive speaker for the money and for their physical size (and I love mine), they are still 2-way bookshelves. The biggest difference between the 2EXs and the Towers is in the midrange—that dedicated midrange driver really does make a difference.
They are, however, basically double the price, so it's no small thing to make this upgrade.
Luna Duo V2 LR, Titan Horizon V2, and Rythmik L22 & L12 in HT, Sierra-LXs in study, S-2EXs and Duo V2 C in bedroom, S-1 NrTs in dining room, S-1s at work, HTM-200s in kitchen. Brother owns CMT-340s and dad has a pair of CBM-170s.