What to do with 1k Soul Gems

Hello everyone and thank you for your time.

So today I got my second drop, 1500 Soul Gems. Thanks to this drop I managed to finish my Fast Soul Gems Farm deck, and now I have more than 1k Soul Gems waiting to be crafted into cards. My first thought was to craft another budget competitive deck (probably one from CVH's Budget-ify series), but then I thought that with the Heroes of Skyrim expansion approaching may be better to save those Gems to craft the new cards. I have only one complete competitive deck, a Budget Aggro Crusader deck, which might be good for the moment, but I doubt will be useful at higher ranks (I'm rank 8, level 23), since for what I've read aggro decks aren't very good for the meta of this game. I was thinking about crafting a mid-range or control deck, but I am now unsure about this decision.

TL;DR So, what should I do? Build a better mid-range/control deck, or wait for the expansion to go live and craft the new cards?

Thank you in advance for your answers.