Dpac,
The S5.4's are a huge step up over the S3.4 in terms of extension and detail. Plus, you get the Confidence tweeter in the S5.4.
Personally, I feel the S5.4 and maybe the Aerial Model 9 are the best speakers under $10K for full-range floorstanders. The S3.4 is also very special, but it's no match for the S5.4.
The S5.4's are a huge step up over the S3.4 in terms of extension and detail. Plus, you get the Confidence tweeter in the S5.4.
Personally, I feel the S5.4 and maybe the Aerial Model 9 are the best speakers under $10K for full-range floorstanders. The S3.4 is also very special, but it's no match for the S5.4.