FunFly makes a lot of sense. If you are going professional, the IMCR is irrelevent. But for the PPL, apart from the 1800m vis limit on runway, in the UK the IMCR gives all the privileges of an IR in all airspace class D and below.
Even for a permit a/c, an IMCR holder has much greater privileges than those without. eg in the CI zone SVFR, an IMCR has min 3K vis limit compared with 10K for those without. And boy, do you need it! That 'goldfish bowl' in haze over the sea can mean you just have to fly on instruments even when well within VFR vis limits.
But beware, instrument flight NEEDS currency (in US terms). Its no good going 2 years between IMC renewals without regular instrument flight, and expect to be able to cope!
Mike