new alarm install

hey guys im going to get my alarmed installed soon and these are the add ons i got. what do you think?

i have the python 990

and im gonna get these add-ons...

EI 507m tilt sensor
DEI 520t backup battery
DEI 513t piezo siren(2)
DEI 506t audio sensor
DEI 508d radar sensor

i have a 97 honda prelude

i see getitng 1or 2 but thats it.If thay want it that bad then well you know

Looks good. install it yourself:D
It's time consuming, but easy if you take your time:fyi: