Hi, I had a similar setup (2500K@4.7/GTX680/2xSSD/1xHDD/Noctua NH-U12P) in a P182 and last year moved all to a Solo II. I'm very happy with its smaller volume while still comfortable to manipulate components inside.
I've tried other case brands for clients (NZXT H2, Corsair 550D, CM 690 II) and believe me, the Solo II has the Antec quality you'd expect.
Acoustics are very similar (after sealing the top vent, same as I did with the P182) and temps are good.
Epilogue: good old P182 has become a quiet home file server