Thanks for the replies all very interesting. As for the pocket fms i had looked at it and read thru their website and forums and people generally cant say enough good about it but...and here is the but ....im terribly inept at anything technological so i prefer something that comes ready to go that requires a minimum of fiddling to get it to do what i want it to do.
The pfms is a bit too tech for me and it involves adapting a piece of hardware(pda) to run the fms software where as the pocket flymap and lowrance or any of the others you pay your money at it all comes ready to go.
Guess my deliberations will continue for the time being but the views , opinions , thoughts coming.