Replacement radio/ head unit

Hi all, thanks for reading this post, I have purchased a Vellfire anh20 (59 reg) just over a year ago, (absolutely love it) the original Japanese head unit was replaced before I got the car by the garage I brought it from. The current unit that’s fitted is a pioneer head unit avh-a240dab, under the radio unit is a small storage gap, I would like to upgrade the radio to one that has apple car play and android auto etc, so my question is does anyone recommend a head unit that’s good with the above and is is possible to have a bigger screen size and loose the storage slot ? I have read about the different speaker amount and I don’t know how many it has got. I have taken the old unit out slightly to get some photos of behind it. Can anyone advise me if I have the correct leads etc to change the unit. Thanks again for reading . *Edit*I do also have a reversing camera 

Edited April 28Apr 28 by Chard6692
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