Z4 insurance in northern ireland

[aerodynamic18]

guys I'm possibly looking at a z4 when i get rid of my car as a weekend/fun car. I put in my details and the lowest on compare the market was £1260! I'm 28 almost 29 married and no points etc and no crashes in last 5 yrs and don't get this i put in 5000 miles only. At this price i won't be able to get it as a fun car any ideas what to try? i was looking at the 3l sport convertible but thats the spec id like