Please Help Me, I'm Lost

I'm at a point here where I really need some help. I feel like I've made some good choices in my equipment but I'm not getting the results I'd like. I do feel I'm somewhat rooted in the past as my formative years in audio were the 70's and early to mid-80's and this is reflected in some of the equipment I own. I think AudioGon and eBay have enabled me to try to recreate the past but it has been disappointing after the initial excitement. I listen to a wide variety of music both CD's and records. What has been driving me crazy is a sibilance I hear on female vocals and some other HF content playing CD's and some records. I have Maggies 1.6qr's which I bought used from a dealer about a year ago, supposedly broken in. The rest of the chain is; a vintage GAS Thaedra recently serviced and in great shape, a Classe CAV-150 which I use only two channels (there are some issues with this amp,one channel is out and only one pair of the three pairs will bridge), a Pioneer Elite DV-59AVI, and an Ortofon 2MBronze cart mounted in a Grace arm on a Linn Basic TT. I was using a single run of 80's era Theta Litz cable which I thought were pretty good. I had experienced upper end harshness before with a really cheap cable so I changed the Theta cable to a run of shotgun DH Labs T-14s I bought from Swampwalker when I purchased his Vandersteens awhile back. I also switched to a GAS Son amp. The DH's are a bi-wire set-up so I actually made three changes, maybe not the best way to figure things out. I don't have resistors installed to pad down the Maggie top end but I do use the Thaedra's tone control for that purpose.This was a positive change. Top to bottom my Maggies sound better but not there yet(I have tried many positions for the speakers and don't think an improvement will be made there). I disconnected a sub from the Thaedra which I had been driving with the second set of preouts and this seemed to make an improvement. I switched back to the Classe amp slight overall improvement but didn't improve the sibilance issue. This Pioneer(which I bought for my home theater system several years ago, now replaced by a Blu-ray) as a CD presents alot of detail nice image and sense of the space but lacks whatever it is to make it special and I know that, but the sibilance issue persists.I would have expected the Pioneer would be at fault for what it didn't do and not for adding this sibilance. Records seem to be fine as the condition of the record and quality of the recording appear to dictate the results.I feed my HT system into the Thaedra so I tried a cd in the blu-ray connected digitally to a HT receiver and then to the Thaedra. It sounded fine not the detail of the other player but no sibilance. Movies and music DVD's sound fine too. Soooo..... what should I do? Are the DH cables with silver a bad match with Maggies? Is the Theadra outdated and out classed? Would a Dac solve the cd problem? Or get a new player? Or are my Maggies not broken in yet or even defective? Please HELP! I feel like I'm chasing my tail..