Help me decide which Toy for training depth

Hey everyone! I think its time for new toys, and new videos with them ;)! So, since I really want to get much deeper than I am now (about 30cm at a diameter of 7cm, and about 40cm at a diameter of 4cm), I need your help deciding which toy to get.
The toy should be long (say at least 50cm) fairly thick at the bottom (at least 7cm) and not so thick at the top, and it should be bendable to get around those bends! :D
I have selected a few which may fit the bill:
Moby Dick: 35x4-10cm http://dildoking.de/de/35-x-4-10-cm-tsx-dildo-mobys-dick-black.html
TSX Mr.ED: 50x5.5-7 http://dildoking.de/de/50-x-5-5-7-cm-tsx-mr-ed-dildo-black.html (I love this horse cock, and it seems perfect for depth training)
TSX Double Fist: 34x9-10cm http://dildoking.de/de/34-x-9-10-cm-tsx-dildo-double-fist-flesh.html
Pumpdildo 44x7-XXcm http://dildoking.de/de/44-x-7-11-cm-riesen-pump-dildo-anale-grande.html
Big Banger Dildo: 48x11 (!) http://dildoking.de/de/48-x-11-cm-dildo-dylan-black.html (This wont fit just yet, but maybe soon? ;))
Dario Horse Dildo: 54x10 http://dildoking.de/de/54-x-10-cm-dildo-dario-black.html (This would fit, but only up to 30cm, I think I may want to start thinner when stretching in depth)
Fist: 57x10cm http://dildoking.de/de/57-x-10-cm-ridley-dildo-flesh.html awesome for depth fisting training!
Fury Horse Dildo: 66(!)x8cm http://dildoking.de/de/66-x-8-cm-dildo-fury-red.html Overkill? :O haha probably better to start with Mr. Ed
Crackstuffers Depth Trainer: 69(!)x7.8cm http://dildoking.de/de/catalog/product/view/id/19366/ If only I could use this properly myself! Maybe somebody wants to use this on my? I would have to be tied up of course!
Colon Aconda 90(!)x3.5cm http://dildoking.de/de/catalog/product/view/id/19657/ For really deep enemas!

What do you guys/gals think? I can only get 1 or 2 at this time (max 150€ +/- 10€)
I really hope to get deeper with one of these toys :D:D Can't wait to try one out!