I bought my Oxford TIG through MigTigArc and was happy with the service - I chose them because they are the nearest supplier to me (not that that really makes a lot of difference). I had some queries with swapping the plug on my existing pedal which they sorted out for me quickly and efficiently.
I bought the 220 AC/DC model and went for the pulse option. I am very pleased with it but my TIGing isn't particularly advanced. It doesn’t have as many bells and whistles as my previous inverter but at my level that is a good thing - i.e. it's less baffling to set up. I am hopeful it will be more reliable than the inverter machine was - it is less stressful turning it on as I am not worrying about error codes popping up on the display . You have to make a much bigger space in your workshop for a transformer TIG though! I'm looking at Oxford (or other Tec Arc) MIGs now, to upgrade that side of things.