what you get depends entirely on what you will use it for and how much your willing to spend.
years ago I used to do field target shooting with this
Its an AirArms S400 .177
Great bit of kit if you don't want to break the bank! very reliable, very simple and you can completely strip, clean and rebuild it in an hour! spares are also readily availible and pretty cheap aswell as there being all sorts of customisations availible.
What do you plan on using it for?
hunting at 100m you will either need a powerfull FAC air rifle or a .22 rimfire. Sub FAC air rifles are only really effective at killing in the 30-40m range and target shooting upto 60m.
don't forget that going the FAC route comes with more costs for a gun cabinet and amo cabinet both seperated and securely bolted to a main wall etc, etc. police visit etc, etc. all the extra stuff you have to take into account when hunting with a powerfull rifle like the possibility of hitting someone walking on a path 1/2 a mile away behind your target.
Sub FAC air rifle hunting is actually a very safe, easier, cheaper and very effective solution to many farmers problems so will be easier to get permissions too.
Also worth joining some local clubs too for help and advice.