If you want HD again, you have to go the cable route - but I think the Kryptview is on it's way out - it has had a greater than expected life RIP :)
A good combo box maybe, depends entirely on your budget what you get, if you have a "sky is the limit budget" ask Cactikid what he recommends, small budget, I think it is more like the zgemma boxes, have a read through the cable section and the zgemma section