Pioneer x930bt or Clarion NX502bt

Ok so im having some trouble picking out what unit i want
i like the pioneer because it streams bluetooth Audio for ipod and also for the phone
i think the Clarion Does the same also

But not sure how the map updates on the 2 car i know kenwood is good cause they have garmine wich updates maps yearly

does anyone know how often pioneer or Clarion Come out with new map updates for there navigation units

also i know the Clarion all i need to do is ground the Parking break i belive so that i can use the navigation options whyll not in park

the Pioneer is much more Difficult in involves altering the actually harness wich i already have a car that is going to be temperamental with the Harness i have heard that sometimes you can mess up the system and get muffled noise if you mess with the GMOS-06 harness that i need to use for my Cadillac Seville 2000 with bose

so im thinking id rather have a unit that just needs a simple ground instead of the repining of some of the wires for the pioneer system

any help here would be great

also is there a forum specificly for clarion does anyone know i have been on the avic forum for the pioneer but not sure if that is a forum for the clarion units thanks

i think they are have searched on youtube there might be something on there about it

i think some are using there blackberrys for it so im not sure why it would not work with your android you might consider going into a best buy that has the unit set up on display and see if you can get it to work and test it out