NoHo is a good enough area and you can always reevaluate when your lease is up. Temperatures won't get much past the low 100s (and rarely into triple digits), whereas out deeper into the valley you can hit the 110s on bad days. If it's still up for discussion and you have a general rent limit you want to stay under I can make some more suggestions. What everyone else said is 100% correct though, you want to be somewhere near your work if you aren't willing to commute an hour+ every day.
There's a great service called
Westside Rentals that compiles open apartments, condos, and houses for rent. Most of them aren't listed elsewhere and there are a ton of gems. These are immediate move-in type deals, where if it's listed it's available to move in right away. The service is $60 a month but I may have an account with a few days left on it if you want to get an idea of what prices look like.
Keep in mind there are some kind-of-not-really sketchy areas of NoHo, but you'll honestly be fine anywhere. If you see a place that you're interested in (complex, neighborhood, etc) let me know and I can swing by and get some information/pictures for you. Or just go by memory.
3. Active night life. Not so much clubs, because clubs suck. But live music venues and concerts. Music a big deal.
You're in for a good time. Let me know if/when you're actually in the city and I'll keep you up on shows. You'll want to get used to going to some of the resident events, too.
Low End Theory @ the Airliner on Wednesdays,
Bootie LA @ Echoplex twice a month on Saturdays, etc. Nonstop music. If you can be out here to scout in August (23rd and 24th)
you can be at FYF, or
Low End Theory Festival in June (14th and 15th), or
Culture Collide in October (16th, 17th, 18th), or...you get the picture. That's not counting the tours and local shows. Music like no other place. I actually keep a pretty solid concert schedule in Google Calendar if you want to be added to it.
I guess a good question would be, what do you listen to? I know you're a Knife stan like me. What else?
4. Food variety is a big deal.
Oh man....you're straight. LA is a really, really divisive city, but if you're willing to be socially active it has all of your list ready to hit up. Those two in particular. I wouldn't split time between LA and SD at all if it weren't for the music scene in LA.
best place for tacos in LA go
Guisados, but tacos are better in SD.