[Closed] Smashed rear mech.. Replacement options?

Was riding Jacobs Ladder on Saturday having quite a lot of fun when I was about a third of the way down I dropped into one of the gullys which is the normal line I take. The rear made a weird noise and didn't feel right so I stopped to find my mech not in such good condition and I had broken a spoke. At a guess the mech must have landed on a rock.

So I need a new rear mech to replace my XT non clutch, but not decided which one. I'm on a tight budget, meaning I will notice the money.

Deore £22.99

http://www.merlincycles.com/shimano-deore-m615-shadow-rear-derailleur-62709.html

SLX £34.99

http://www.merlincycles.com/shimano-slx-m675-10-speed-shadow-rear-derailleur-60109.html

Zee £41.16

http://www.tweekscycles.com/components/mtb-rear-derailleurs/shimano-rd-m640-zee-10-speed-shadow-design-rear-derailleur

XT £42.99

http://www.merlincycles.com/shimano-xt-m786-10-speed-shadow-rear-mech-58057.html

They all seem good value for money which makes it a difficult choice... What does STW think?