They can do the job for sure, if you are wanting a good steel to cut food with then go for it. In my opinion I don't see the need of a higher end blade to cut food with, that's just from my experience, I've had the same serrated steak knives for 15 years, they are just regular cheap economy stainless steel blades, nothing fancy, used them for parties, get togethers, and everyday for dinner, sharpen them once a month and they do the job absolutely fine.
If you are willing to pay the price for those blades then do it, nice sweet blades to cut my big meat with. But make sure you look around first, they have a lot of good deals online especially eBay