Depends really what you’re doing:
Ultra light solo backpacking: TN Laser Comp or Photon. No frills, no room for dogs/girlfriends/full size companions
‘Luxury’ Backpacking: The Akto above or good value; North Face Tadpole, now around £150. Lots of other stuff around at ~1.5kg – 2kg
Bike packing: See ‘luxury’ backpacking
I use a TN Laser Comp for superlightweight one person backpacking and a Robert Saunders Spacepacker if I have a mate along. Yes you need to be careful where you pitch (as you do with all nylon groundsheets) and space is limited that’s how they’re light…. Don’t expect frame tent levels of space but revell in the lack of weight.
I use a North Face Tadpole for bikepacking (or backpacking when I can get someone else to carry the extra weight :-)). Fantastic tent, loads of room, bit cool in winter as there’s lots of mesh (‘merican design).
Lastly, a TN Quaser is used for carcamping, winter mountaineering and times when weight is not an issue. These are bomb proof (almost) and have loads of room. I used to use a Phoenix Phortress, double A pole tent for these types of uses. Very strong and reliable though heavy and not as roomy as modern domes.
So, if you want superlightweight one person+smal dog/midget, go for a TN Laser otherwise the Akto or Tadpole if £££’s are a consideration.