I would suggest a 3.7v mod, as I think those are the standard when jumping into mods.
I would suggest the REO grand, for it's true simplicity. It's the best looking box mod in my opinion, so it's great to bring it on the outs when you're driving, as you don't have to drip and drive, but yet you get the same flavor as if you were dripping.
It can be a 3.7v mod or 6v, i think maybe even 5v? Just depends on what batteries you use. I think it even fits the 18650 batteries which are the highest "mah" of the 3.7 volt (more mah = last longer), so that would be great for you.
it doesn't matter if you dont' like LR because you can use any kind of atomizer on there, LR, HR, SR (just make sure to match it to what voltage you're using) and you can also use cartomizers if you don't like dripping.
pretty much provides everything with alot of options. here's a youtube review on the REO Grand:
YouTube - REO GRAND FROM REOSMODS.COM
if you don't like the box shape, there's plenty of "tube" looking mods. here's a good database that has pretty much every mod out there, this link is for the tube shaped ones:
Battery Tube e-Cig Mods | e-Cigarette Mods Database
some of the more popular tube shapes are, but not limited to, the Silver Bullet, Prodigy, and just too many to name.