Hi Lenny
I am a daily user of the Aquapac DSLR case so I thought I would comment.
The trouble is simple really. There are lesser models out there that I have used and broken within minutes but the Aquapac case is what I would describe as being 'bomb proof'. I trust my kit to it every day which is valued over £2000. I have taken my case down as far as 10m (not recommended however)and the welds stayed exactly as they were.
Durability and warranty were big drivers for me when I bought my first one and they have never let me down.
Aquapac are a brilliant team to deal with. I do not work for Aquapac but I was so happy with their products and support that my company is sponsored by them.
If you follow the correct instructions when you use the case it will last you years.
I would be happy for you to get in contact and I will give you some hints and tips on how to get the very best images out of the case. Mine and my teams images win many prizes standing right next to Ikelite £3000 cases!!!
In short, you simply do not want to trust your gear to something that is cheap. £30 - £40 on a case and it goes wrong you will never forgive yourself.
What price did you really want to pay to risk your gear?
Feel free to get in contact and I might (might) be able to help you with some of my discount, it wont be much as they are really priced competitively to sell....closed rival is £1800!!!
With the very best regards
chris@lazyblueskies.com