best strimmer to buy?

[what..the?]

hello I have a medium sized garden all tall grass which has over grown and blown flat, there are lots of objects to cut round and gradients so I think a strimmer is the only option I have just bouhg the house and plan for the garden to be completly redesiged with low maintenance materials so not grass so this will onlt really be used for a year maybe.

I have a mega cheap argos one with is battery and cost £15 ot doesnt really cut anything. I am completly none the wiser on these things so wanted some help.

Things important to me:
- length of use was charable one not last long befor it needs recharging would petrol be better
- easy to use with good cut
- safe
- easy to clean
- willing to spend upto around a £100 but as it would only be used for a year is it worth getting one this expensive.
- anything on offer?
- to be bought from local garden centre, DIY store or Argos. If from Local garden centre would need recommended retail price so I know they are not having a laugh!

Thanks in advance

[Old_Geezer]

Worth noting (saw much the same at 2 websites)

"The manufacturer of Stihl and Viking products have requested that all their products be sold with a face to face handover in order to cover all safety issues."