Worth upgrading rear ARB?

Lads I've an E46 318ise running OE M-sport springs and shocks.
It still has SE ARBs, the front SE bar is actually thicker than the sport but the rear is thinner at a mere 15mm, I think the sport one is 18mm.

I'll be doing the rear diff bushing soon which will involve removing the rear ARB and I was planning to replace the ARB bushes while I have it off.

Am I likely to notice much difference in the handling with a thicker rear bar? I could pick one up cheap enough in a breaker I guess.

I realise it would make the car a little more biased towards oversteer than my current setup but is it worthwhile?

Cheers.

If you're going to be taking it off anyway, and it's cheap to pick it up at a breakers then I think you should do it for sure :)

Id go for it if you can pick one up cheap your going to be changing the bushes anyway makes sense il say you will get the same feeling as say someone moving from the bigger arb to an eibach arb or similar

Plus more oversteer isn't really a bad thing [emoji1]