I had both of the amps you mention & want to throw out the Ayre V-3 to you as an alternative.
To me the 4BST was too analytical & the Aleph 5 was too warm. I used a Pass Aleph P pre with all three of the above amps & only sold it to get a one-box pre w/phono.
My choice of music & type of spkrs. are different & if I had to make a choice between the Bryston & Pass, I'd go w/the Pass.
I've stayed with Ayre for almost 4 yrs. now, moving up through the line.
Since you mentioned you're new to this, let me also encourage you to look into the other aspects of audio, which includes (but is not limited to) the room, AC, isolation & tweaks.
To me the 4BST was too analytical & the Aleph 5 was too warm. I used a Pass Aleph P pre with all three of the above amps & only sold it to get a one-box pre w/phono.
My choice of music & type of spkrs. are different & if I had to make a choice between the Bryston & Pass, I'd go w/the Pass.
I've stayed with Ayre for almost 4 yrs. now, moving up through the line.
Since you mentioned you're new to this, let me also encourage you to look into the other aspects of audio, which includes (but is not limited to) the room, AC, isolation & tweaks.