Of the items you mention I think the two best would be the Raven Pro axe and the Petzle Irvis crampons.
The BD Raven and Raven pro axes have the best ergonomics of any Piolet's available, hands down. Their is a small weight difference which makes the raven chop a bit better in hard conditions, think chopping out a tent platform on a glacier, but the Raven Pro has a thinner pick that is more useful on any sort of ice. You can get the Pro pick to stick in water ice, not so with the Raven. If you need to do much where the lack of head weight is a problem you are probably better off with a real ice tool of some kind. I like it better than the Pezle Snow walker because of the rounded off head (if you are going to use an ice axe for days on end his really does make a difference) and the slightly larger shaft is easier to hold on to. I am not aware of any problem with the head-to-shaft connection, and I think Rivets would actually make it weaker.
For crampons I would definitely reccomend steel. If you spend much time in technical terrain in the mountains you will learn to climb rock in crampons and do so often for a variety of reasons, aluminum crampons won't survive this sort of abuse.
The camp ones are probably good, but I don't know much about them, the pictures look good. The BD Contact has poorly shaped front points that make it not that useful on ice, for ten dollars more you could have the Irvis which is actually a very versatile crampon with excellent front and secondary points and the ability to be made rigid. You can climb technical ice in these better than most 12-point mountaineering crampons that don't convert to rigid.
The steel KTS look like a very light and durable set up for what they are intended for, mild terrain. If you don't think you will ever need to front point on slopes steeper than say 50 degrees or climb anything harder than 3rd class rock in them they are probably the way to go.
All that said used crampons and ice axes can be an excellent way to go. For the vast majority any 10 or 12 point crampon not designed for waterfall ice and pretty much any axe can be used, and $50 used crampons and $40 used axes are not hard to come by in used gear shops or on climbers bulletin boards online.