I have used the 2500 psi steel 95 and LOVED it. It was about the same size and weight as a Aluminum 80, but gave me a bit of additional air and better buoyancy.

Being that they are similar size and weight to Alum 80's they could be put together to make a nice and fairly lightweight set of doubles.

I don't know how much this matters to you, but I have heard that the higher pressures of the 3500 psi cyls help to wear out regulator parts easier. I don't know if it is true at all, but I thought I would toss that out there.

The other consideration as The Publisher said is getting the correct fills. I am under the impression that any dive shop in the US would be able to give you full fills, the problem would be on a dive boat. Some of the compressors onboard diveboats might not have the ability to give you complete fills. So you have to look into how much air you actually have at 3000 psi for those conditions. I guess it depends on what you are going to be using them for.

Now lets see what kind of great Faber deels pop up here.