Hello Adrian and welcome aboard.
I have just had a quick look, if you click on show details, this one is showing as no longer available. However you have made I think an excellent choice in Dell. I will be going for one of their workstations as soon as my budget allows. With your budget you should get one more than capable as HD is very processor and memory hungry. The great thing with Dell tell them what you want to do with it and they will build it to spec with the latest electronics. I have always had Dell since upgrading from Olivette and Windows 3.1. So yes I would say go for it.
I see you are using Pinnacle studio. I use version 12. How are you getting on with it? Cant say I have had any major problems but it seems others have. Though my current computer cant handle the HD part of the progamme I know I need to upgrade.
Anyway there is an abundance of help around this friendly forum see what others have to say. All you need to do is ask.