From my experience Cs loxinfo is the best provider (fairly price and good support ) , but they can't provide optical cables that area only radio link (limit to improvement in the future).
For TT&T the telecom solutions is a main product the internet connection is the second one. They are number 3-4 for link connection solution . The internet connection not popular for company. the mostly for home used, but in that area they're better CAT telecom. For comparison TT&T with Cs loxinfo. I think, TT&T is better CS loxinfo, because they have optical fiber (8-12 connections for us) it will be enough for improvement in the future and the connection will be stable for our operation. Both provide have SLA which the same one little bit different.
For the decide we have to waiting the price detail from TT&T before.