Novatac is a very nice flashlight, I also EDC mine, best EDC IMO right at the moment, but that may soon end as THE_day are also getting at, HDS are coming out with a new series of flashlight, should be ready for pre-orders at the end of this month, am very exited about what HDS will be announcing, they have to do a pretty good job, to be able to compete with Novatac IMO.
If you cannot wait, then just go for the Novatac, you can always sell it on cpfmarketplac is you don't like it, personally I cannot see what HDS can do better since the Novatac IMO is pretty close to be perfect.