Real Time Dataproviders for MS RT

["T.E.M. Lockefeer" <sky40912@xxxxxxxxx>]

All :
 
i am considering going Realtime MS.
 
i know there is Esignal as rt dataprovider but expensive or 
?
 
which other RT dataproviders  (mytrack ?) do you 
know
(experience ?)  and which are and reliable and cheap 
?
 
 
Thanks
 
Theo Lockefeer.