Which one is better for me - Kawasaki Z800 or Triumph Street Triple?

You should go for the Triumph Street Triple as the bike has a 34 mm lower seat height when compared to the Kawasaki Z800. The bike comes with a 800 mm of seat height and a kerb weight of 188 kg. It comes with a 675 cc, liquid-cooled, 12 valve, DOHC, in-line 3-cylinder engine producing 77.7 BHP @ 11,050 rpm and 57 Nm @ 8,375 rpm. The bike is very powerful and reaches a top speed of 220 kmph. It comes with twin front 310 mm floating disc brakes and a single rear 220 mm disc brake. The motor gets a 6-speed transmission. At INR 7,50,000 the Street Triple would be an ideal choice for you for a weekly get away.