Might not be similar in terms of shape, but hard to go wrong with the 750d; room for 6x 3.5" drives in the two cages.
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1 x
Corsair Obsidian 750D Full Tower Case - Black (CC-9011035-WW) £138.98
Total : £138.98 (includes shipping : FREE).
If you want to keep the cube shape the Xigmatek isn't a bad choice. MATX and drive bay arrangement is 6x 3.5" and 2x 2.5"
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Xigmatek Gigas Micro ATX Cube Case - Silver £86.99
Total : £86.99 (includes shipping : FREE).
And if that wasn't enough you could always consider what I am doing and mount the 3.5" drives into the 5.25" drive slots. That would give you the 4x 3.5" drives you wanted.
Silverstone do a bracket to do exactly that, but people also recommend the bungee mod stickied in the Case Central part of the forum.
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1 x
Silverstone SST-SDP10B Bay Converter 5.25 to 3.5 plus 2x 2.25 inch £10.99
Total : £10.99 (includes shipping : FREE).