I honestly cannot comment on the Solilquy, but I do own the Swift's, powered by 2 Bryston 2b's and a Blue Circle pre. The biggest factor is room size and placement. If the room is too big, the Swifts will soound weak on the bottom end. I love the Swifts, actually one of the best sounding speakers I have ever heard (In the Price Range), they replaced a pair of maggie 1.6's the room was just to small to let the maggies breath. If your dealer can let you take a pair to try, it would be your best solution.
Meadowlark Swift vs. Soliloquy vs. Concertinos
I need help picking between these three speakers. I am using an audio refinement complete integrated amp with a cambridge audio dvd player with all analysis plus cables. I have listened to the Swifts and Concertinos and like them both very much. I have also tried the Triangle Zephyr XS's but they seem a little too forward (analytical). I have not heard the Soliloquys but have read some good things and they are the cheapest of the speakers i have been looking at. I listen to a lot of acoustics and vocals. If anyone has some advice it would be greatly appreciated.