Nightforce is selling a new all weather system called the TDS Recon and TDS Nomad
that looks pretty good. The TDS Recon is $900.00 and the TDS Recon is quite a bit higher but I don't remember how much higher. It has a lot more memory capacity and it has a built in GPS. The same device is used in the industry that I work in and it's very robust.
I use a Dell Axim 50. There's a newer version out there. I put a different (larger) battery in it (works great) and run LoadBase 3.0 on it.