KostaVan, if you order a pair of x-ls from av123 they give you a 100% money back guarantee. If you return the speakers they refund your purchase + pay shipping both ways. As someone else suggested, you can order a pair of those and one pair from Ascend for comparison. Not much risk in that scenario.
My opinion: Ascend set up is better for music. Very neutral. Pretty comparable for HT. x series stuff looks way better to me, and if you don't want just black they really have some cool options for veneers and finishes. And they are cheaper. Shipping is more, and non-black is more, so figure all that in. You will probably wait a month for x series. I think Ascend will ship when you order.
Disclaimer: I have 3 x-cs as my L/C/R.