Ah yes, they are very pretty indeed! I like the look of those a lot. And much better suited to hard water.
Now to choose which aquarium. I think my top three contenders are:
Superfish Home 110 - would need to buy a heater to go with it, not sure which one is the correct size.
Juwel Rio 125 - similar price
AquaNano 80 - possibly my favorite but a tad more expensive.
Will have a think a decide then look to set the tank up, think I will be going with a difference scape for this one too as mine is just overgrown with plants!