Thanks to all for your suggestions and comments, guys. I am a bit late but to clarify some questions, first off my company typically orders from RS online, which is our main supplier. Their offer of heat guns is pretty restrictive though and not many models seem to be available (for the plug model type). I have watched one of Dave's reviews about heat guns and he suggested not to go crazy on the price since there are cheap models that are perfectly fine.
I intend to use this gun for desoldering under controlled temperature and of course heat shrinking. On the other hand if it can also help with reflowing and SMD every now and then I'm all for it although I do plan to buy a dedicated oven for that purpose; in such cases the heat gun would mostly be used for troubleshooting, sort of. So far my tightest requirements are for desoldering as I already trialled myself at desoldering some connector with a gun that had no temperature control and I almost toasted the board so I'd rather avoid that from now on :-D . So rather than having one gun for each usage I've opted for one that would suit most uses.
On a final note, I'd rather avoid gas devices. First and mostly due to temperature requirement. The Atten looks interesting indeed unfortunately it's not available from our main supplier.