Yes Andy, it's the Scorpion Serket I've fitted to mine, I got a good deal though can't recall who from right now, then sold the twin arrows that were on her when I bought for almost the same money, happy days.
Hi mate and welcome to the forum , enjoy the Speedie and ride it loads, there .. that's the first bit of advise!
I am lucky in having a garage & use a ground anchor & almax chain. I just use a disc lock or u lock when I park. I tend to avoid leaving it anywhere that is 'dodgy'. Not at all keen on alarms. It all depends on your own circumstances really. If you do have to park up for example at a hotel for a weekend, I would recommend a decent cover to keep prying eyes off as well as a lock or two.