Hi Steve, and welcome to UCUK.
I'll second what Brian says about the round cabs being a bad idea for your needs. If you think your landy is loud, take a high road speed run in a U900 and when you go back to the landy you won't even notice the engine running!

The 1300L is a very nice vehicle. Much more refined and more space. On top of that it's great to let a government take the hit on costs and buy surplus spares on the cheap! From what I can see of it the 1300L is a very common machine all over the world - a big help if you are abroad and need a part. They seem more popular in Europe than they are here.