I think 2.3 kilos for a large Antler suitcase is excellent for weight. Antler are some of the best and most hardwearing suitcases. I know when mine arrives on the carousel it's always in good condition and I have had a long time and it's been to the States and back on four occasions.
I looked at these cases on the Argos Website. So £79.99 for a large case that weighs 2.5 kilos. and is guaranteed for 10 years. However, as no one has had one for 10 years I suppose we don't know if it will last. Also if the case arrives in bits and your luggage is lost or damaged will the guarantee cover that? I note one review on Argos says the buyer used it once picked it up at the end of the journey and found a 3" rip.
If anyone buyers one, remember not to loose the guarantee.
I have seen these cases in a discount shop in Fraserburgh and they seem very flimsy and expensive to me, they also look cheap (but there are not).
I will stick with my Antler cases.