If you want to get the SD and HD channels and make the passthrough to your TV set, the best option is to get the Slingbox PRO HD.
Its internal built-in tuner will allow you to send the signal to the TV set while using the SlingPlayer software, without affecting each other. Finally, keep in mind that this is the only Slingbox model that streams the HD quality.
The following link will allow you to get all the information about the Slingbox PRO HD and its features.
Thank you for your reply.
I have also looked a bit deeper into this but I'm onsure if the Slingbox HD PRO has a DVB-C tuner - as I can see from other posts this is not the case?
If not then I require a STB to be connnected before the Slingbox with a coax splitter as I would like my wife to have full controll of our TV when I'm travelling.
I want to revive this thread to see if the answer has changed in the last year. Is the Slingbox Pro HD still the best Slingbox for no TV Settop box setup? Is there a way to compare Slingboxes? The new compare link only compares 350 and 500 and doesn't even list built in tuner as one of the features.