This dilemma is near and dear to my heart! I think a lesbian elf duo would be super cute, but... Solas! 
As for class, I'm pretty conflicted. I love the idea of a tomboy rogue punching people in the face while her nerd boyfriend facepalms in the background (..what? It works!). A Dalish hunter is not going to understand magic or the Fade as well as a First, which could be fun 'cause Solas gets to explain all that stuff to you, and you might have fewer preconceptions about the Fade. Plus, you're not supposed to be magical but YOUR HAND IS GLOWING OMFGGG so Solas having a handle on all that is pretty sexy. Or maybe that's just me LOL.
But I also get a very Merlin and Nimue-esque vibe with mage!Lavellan/Solas. He is the (potentially) older, wiser expert and you are the eager student... mmm... (ahem. My mind is going places it shouldn't, sorry). That tweet said that he can compliment your skills as a mage, which would be lovely!
This is exactly my dilemma.
To mage or not to mage, that is the question -
Whether 'tis the desire for stabby Tempest
Whose daggers could pierce the very heart of the Fade
Or the joy of a class matched in lore
Which is my prefer'd path to take? To mage, to rogue -
Not warrior, that unwieldy class
Who lacks the subtle gifts of the Fade
And the cunning dexterity of the rogue.
For with Solas, to be Fade nap partners,
To sleep, perchance to Dream. Aye, to wander.
For in that sleep what journeys in the Fade may come
With the elf of such divine baldness?
It must give me pause. To choose
Which class shall see me through the game.
Yeah, I'm going to stop there before I murder the Bard any more than I already have.