I have been looking to upgrade my computer and
have been following this post with great interest.

Prior to BIAB 2010.5, without the new stretch feature,
I don't recall experiencing any audio issues.
Since using BIAB 2011, with the new stretch feature,
I started noticing audio drop out.
I tweaked my computer system trying to reduce other background functions that
placed demands on the system, it help a little but occasion audio drop out still would occur.
Using Task Manager to monitor the computer's performance, while using BIAB with the new stretch feature, CPU usage would peak and hang at 100% very often, rarely drop down to the 60 range, but available RAM would remain at 400MB or more.

Testing my system with Geekbench without any other programs running:
Geekbench Score 1510
Processor interger performance 1585
Processor floating point performance 2000
Memory performance 900
Memory bandwidth performance 758
Op. System Microsoft Windows XP Home Edition
Model HP Pavilion 061 EL494AA-ABA a1226n
Processor AMD Athlon 64 Processor 3400+ (1 processor 1 Core 1 Thread)
Memory 1.44 GB 400Mhz
Processor Frequency 2.19
Buss speed 200MHz
L1 Cache 64 KB
L2 Cache 512 KB
L3 Cache 0

I really like the new stretch feature in BIAB 2011,
but I feel my processor speed, Buss speed, L2 cache size, and Ram speed are a little weak to support the demands this new stretch feature demands.
It will be interesting to see other folks Geekbench results and experiences with BIAB 2011 and the new stretch feature.

Bill