If you are just wanting an SDS for normal sized holes, chiselling small areas and channels etc then get a 2kg model. £100-120 should get you a Bosch Pro or Makita or just grab something <£50. I have a cheap Lidl one that was £30 that is fine for household jobs.
I used to have a larger 5kg one from Aldi that looks exactly like the titan one which I used for drilling holes up to 1″ through 2ft+ walls, tearing down brick walls, putting in mini piles in the garden etc. It had a hard life and eventually died but did well. I would not want to use it for general DIY, the 2kg one is much better for that.
I was going to buy a small Bosch or Makita SDS but the Lidl one did the job. Will get a decent branded cordless impact driver and new cordless drill next though. My little Bosch 14V lithium one has put up good service for the last 9 years but the chuck is starting to play up. It has drilled and screwed hundreds, if not thousands of holds and screws though. Pretty good for a DIY one.