out of those - it would have to be the prusa.
The guy invented that particular style of 3d printer and has been improving the design ever since.
(looks at link) Ah okay, that's NOT a prusa.
Avoid acrylic frames.

I've yet to decide on the one arm style machines.
Have a look at monoprice mini-delta: https://www.amazon.ca/Monoprice-Cali...ice+3d+printer

Not a huge build volume - but one helluva good printer and ideal for a first timer as it's got everything a far more expensive machine would have: auto levelling, wifi, fast, quiet, removeable, flexible printing plate.
And it's just about the cutest machine I've ever seen.
As soon as they become available in the uk (postage and import tax from the states are ridiculous) I'll buy one.
Check out the youtube reviews.
That single negative review on amazon is pretty much the only negative review I've seen for one of these.

If you want to stick with the i3's have alook at Tevo: https://www.amazon.ca/TEVO-Tarantula...evo+3d+printer
All aluminium extrusion frames. And generally well built machines.
You'll find a huge user base for the tarantula, with lots of mods and improvements.
The advantage over the ones you listed is tyat you're starting with a standard aluminium frame. So easier to bolt stuff to and giving rigidity that a 3d printer needs.
https://www.thingiverse.com/search?q...45b4f28b576541
Bunch of stuff for them on thingiverse :-)

The Flash is worth a look - might be slightly out opf your budget once you've done a currency conversion - but it's still pretty close: https://tevo3dprinterstore.com/produ...truder-as-gift