I recently used Dunlop 185/13 Dunlop on my Baleno and found them to be very good and soft tyres, my car now runs even more smoother on these tyres.
Regarding security, I guess not much choices are available. First of all have it insured comprehensively. Next, install a remote secuirty system which can guard your car even when you are not around. And finally, if you can afford, why not use a satellite tracking system?
All the best!