I avoid DHL simply because the nearest depot is nr warrington so it's a heck of a way to have to go and collect a parcel.
I chose the other one last time and they delivered quickly. seemed well packaged and not damaged this time too, but that might be because the delivery bod left it in the corridor outside my flat when they found I wasn't in rather than taking it back to the depot (rather naughty really as it was blocking the corridor, but I was happy to see it there when I got home since it saved me having to take time off work for a re-delivery). Parcels used to be deliverd by parcelforce but I don't know if that's changed now. The one before last was left at a post office for me (I didn't request that) which was a bit odd and rather inconvenient. Not sure who the courier was but I didn't select DHL so I would imagine it was the other one.
edit - now that I come to think of it - the time before last it was parcelforce because I only found out it was at a post office when parcelforce sent me a letter. so I'd guess the other one is parcelforce at this end.