I find the new Sr5 HU a very good FACTORY! deck. And i have seen a fare few.
Sound quality wise its very good. It has decent voltage coming out of the speaker out channels (checked at all frequencies)
sat nav works 99% of the time. except for some no through roads
I would never buy one though .
Ther are so many good satnav decks that will kill the toyota one and look like a factory fit with a bigger screen.
Does the SR even have sterring wheel controls?.
That would be the only reason i would want to hang on to it if i have to change one day. that day will come.
Here are some options:
Kenwood DNX4310DABNAV (dvd/nav/bt/dab/receiver)
Eclipse AVN827GA (dvd/nav/bt/receiver)
Clarion NX702A (dvd/nav/bt/receiver)
Pioneer AVIC-F40BT (dvd/nav/bt/receiver)
Orion AVR6.1 (dab/dvd/nav/bt/receiver)
JVC KW-AVX836NAV (dvd/nav/bt/receiver)
Philips CID2680 (dvd/nav/bt/receiver)