The Studio is designed exactly for 1, but can't attenuate the signal to the cab.
Reload + Studio may be your answer, yes. It will be quite costly but you'll have the best from Two Notes Audio Engineering !
You may also want to look at the following setup : Reload + CAB. The CAB brings to the Reload just what it lacks : the speaker simulation. It's a more affordable and light setup. Mixing options will be reduced because the CAB is mono, and only has analog in/out (this is not really a huge limitation, but it's worth mentioning), but in the studio, you will be able to use the WoS III plug-in for unlimited mixing.