Hey Corsa,
you actually have an awesome profile, especially for a 19 year old! great that youre starting out so young and already have a good grip of things -- it'll allow you to build your AAoA pretty early.
What type of expenses are you usually putting on your card for work ($25k)? Travel (airline, hotels, etc.), business expenses, business lunches, etc?
When you fly, do you typically fly Delta?
if you're already a Delta Skymiles member, want Amex, and want a travel card, the Delta Skymiles card is probably your best bet. I've seen people in the 700's and even in the 660's or so get approved for it. Naturally, the Delta card is best utilized if you're buying a lot of Delta flights (which will tend to happen if your airport is a Delta hub) and less useful otherwise. Keep this in mind whenever you're considering a card with an AF ($95 is pretty steep).
The other option you mentioned is the Chase Freedom, which will allow you to build your relationship with Chase and eventually go for a Chase Sapphire Preferred. CSP isn't that great with Delta in particular (can't transfer directly to Delta), but it's incredibly flexible otherwise. Plus, you can earn all the points on your Chase Freedom in the meantime and transfer those points to your Chase Sapphire Preferred, so in the long-run you'd be pulling rewards points, not just travel points.
I think either card is within reach, and definitely worth going to the reconsideration line if you get denied. Regardless of what you decide to apply for, you could probably ask for a credit line increase on your BofA anyway. Just request the CLI after you apply for whatever card you want.
@user5387 wrote:I would find some way to separate out the business expenses, perhaps using a business CC or an Amex charge card.
I thought about this, but all of the business CC's and charge cards have pretty big annual fees. additionally, unless you file as a sole proprietor for your business card, it won't really help boost your credit score, now would it? It seems that right now OP is pretty interested in building his credit portfolio.
Charge cards are typically easier to get than revolver (credit) cards. This is because there's "less risk involved" since you're required to pay in full every month.
In the same vein, charge cards won't improve your credit score as much, since you're hardly actually "managing credit." So this will be good in building for AAoA, but won't improve your utilization.
The Delta card will probably be on par with the PRG in terms of approval likelihood. So the decision is up to you. If you don't get accepted (which I think you have a good shot at getting accepted), I think you'd be served well by calling their reconsideration line.
user5387 was suggesting that it might be a good idea to have one card for business expenses and one card for personal expenses. the card for business expenses didn't necessarily have to be a business card, but separating your expenses could help you keep track of which is yours and which isnt (if that's an issue).
no problem about not getting a company business card. it's actually better that you dont so you get the points for yourself! :]
maybe the mail offer was a sign!
First, let me say you're doing a fantastic job managing your credit!
Since you seem to have a large amount of reimbursable purchases, I would suggest the AmEx PRG because it racks up MR points fairly quickly at your level of spend and it will build a relationship with AmEx (which in turn will allow you to app for a revolver later down the road and probably get approved).
I think you also have a great shot at obtaining the Freedom if you are interested. I have that card and I love it. 
