Hi All, looking for a program

I am based out of Washington DC area, so not sure if I should continue building on United or go to another airline.

1. What is most important to you in a frequent flyer program (FFP)?
upgrades, priority services, baggage allowance, good award redemption rates, better award access, lounge access, etc.
>>>Reply:
UPGRADES. I'd like to start having the ability to fly in a nicer class on trips. For international trips such as to South East Asia or Europe.

2. How many miles do you usually fly each year? How many flights/sectors?
less than 25000 miles, 50000+ miles and 20-25 flights, etc.
>>>Reply:
Expecting to do less than 25k miles a year

3. What fare class do you usually buy?
first, business, premium economy, economy
>>> Reply:
Economy

4. Are you able to choose your airlines and/or class of service? Do you travel for work and/or pleasure?
>>> Reply:

5. Which routes do you fly most often?
transatlantic, domestic USA, intra-Asia, etc.
>>> Reply:
Domestic USA

IAD-MCO, IAD-SFO, IAD-LAX


6. What is your home airport?
>>> Reply:
IAD

7. Do you have status in any FFP? What is it? How miles do you have banked in each FFP, if any?
>>> Reply:
United Airlines, 115k lifetime miles, 2k miles currently


8. What are your preferred airlines, if any?
>>> Reply:
Virgin, but they dont really have all the routes I need.

Other airline suggestions? I'm pretty flexible on airlines.