Quick question for you EVH, re the HDMI over cat6 baluns. Did you test the cheap (~£20) sets available everywhere from the likes of the rainforest and ebay? The reviews on the rainforest seem to suggest that they are OK, but it would be interesting to hear your thoughts as you have no doubt researched this.
HDMI over cat6 solutions seem to vary in price so much, i have ordered a cheap set for when i get home to "test", as i have a similar rack&distribution system due to be going into a house we are in the process of purchasing.
Edit:
Further questions as i have just read some more of your posts and you have opted for almost exactly the same kit as me
1) The cheapo ebay waterproof ceiling speakers - what are they like? Passable at volume? I was planning on the same items.
2) What did you use to feed the speakers? I have a ton of old cat5e which i will not be using for data in favour of cat6, so i was planning to use that possibly, 2 pairs pos 2 pairs neg?
I've got a hdbaset system here, for testing.
In effect, it's better than a HDMI over cat6 solution, because it only requires a single cat 5/6/7 to pump full HD. However, the downside is cost. I've been testing 2 different suppliers systems, and each transmitter/receiver is £400-£500.
I've also found that while it works flawlessly with every source in the rack, it just won't play ball with the Onkyo receiver.. throwing a green screen (bad HDMI handshake / HDCP error). HDMI over cat6 gets around this (especially the cheap ones) by terminating the HDCP i.e. stripping the HDCP from the signal, so you get better success rate.. this is why many suppliers are now moving away from that and going hdbaset (the HDMI.org is not best pleased about people messing with copy protection).
I'd still recommend them, however I have a £90 transmitter/receiver set from HDCable.co.uk, so I can't say how the cheap ebay ones perform. I'd say the critical thing with either system is a direct connection. Do NOT put any wallplates or connectors in the way of the cat6 and you'll be fine.
1) No matter how much you spend on speakers, you're always limited in bathrooms / areas with massive "hard" surfaces that reflect sound. This is exactly why I didn't go for the B&W speakers I used everywhere else.
From my testing, they are more than ample when taking a shower / bath / toilet. I haven't cranked them yet, but they are great at low to mid volume.
2) I used Van Damme 2.5mm speaker cable. Bought it from The Media Factory (
www.tmfsolutions.co.uk). One of the guys, Joe Ferdnand posts on AVForums and can quote you for any length you require. I bought a massive 500m drum, as I installed it everywhere with an audio source.
I have used Cat 5 on a job, in the past, and it will work, but if you have the option then I'd always go with speaker cable / bell wire over cat 5. If you really want to use the cable then you could just use 2 pairs per terminal, or even 2 cables per speaker (+ve and -ve).