I have one on my turbo busa because the speedo is so inaccurate.
I have a Garmin 60CSx that I will be backing up with a Foretrex 401 (as soon as we get them). The 60CSx has worked better than any GPS I've ever used. It worked inside an airliner all the way to Afghanistan, it worked inside an MRAP, and it has worked in every chopper I've had the displeasure of flying in. Don't bother paying for the Garmin maps. There are free topo maps online - http://www.gpsfiledepot.com/maps/ The Afghan-specific ones are controlled and harder to come by, but the S-2 can probably help out. If you go with the 60CSx, I recommend getting the Blade-Tech case for it. Straps to your molle gear and protects it really well. Get an Invisishield screen cover too.
As for the 401, a LOT of guys on the ground run around with these (and since it matters to some gear queer clowns, a lot of the ODA guys had them too). They are lightweight, rugged, and are a handy quick-ref for your pos. Strap them on to your wrist or the shoulder strap of a plate carrier.
ps, phrogpilot - You're showing your age. We don't use the VIPER or the PLGR anymore. VECTOR/DAGR is the new iteration. I think all the PLGRs are at DRMO and I've never actually seen a VIPER in person.
/FAC perspective
This is probably a retarded question, but the 60CSx allowed you to get accurate grid positions or where you only able to get positions in lat/long? Also do the topo maps come in meters or is everything in ft?
Though I've never flown a military aircraft with a Garmin handheld, I can say that flying with the Garmin stuff on the civilian side has been wonderful. There's nothing better than hitting that GPS Direct button, and having satellite weather, traffic, and XM Radio all in one unit. It's almost like cheating. The only thing that would make it better is if it could be coupled to the A/P.
Addition: Be prepared to sell your first born child to acquire a new one of these. Or, make friends with a Garmin employee.
Had a chance to screw around with a Garmin 696 in the kneeboard configuration - wow!! just wow!! I can't think of anything that it can't do. Want an approach plate - bam, done... want XM weather done...
" If the current approach is known, the 696 automatically selects the correct chart based on the flight plan. When in IFR map mode, the 696 can display victor airways, jet routes, minimum enroute altitude and leg distance, much like found on paper enroute charts."
it's just pretty cool.
the 60CSx allowed you to get accurate grid positions or where you only able to get positions in lat/long?