I've been reloading for years, but just recently got a 650xl (the 650 is awesome). Bayou bullets or Berry's bullets are priced reasonably. Montana gold are good also, but will cost you more money.
If you're shooting 250 rounds a week, then you definitely need to reload. Look online for a reloading calculator! It will breakdown components and it will tell you how long it takes to pay for the press with reloaded bullets. If you can't find a good reloading calculator, PM me and I'll send you the one I use.
I'm sure several people will chime in on their favorite load, but you will need to experiment with powders and bullets to determine what's best for your intended purpose. For example, I use 124 Montana gold or Berry's 124 gr RN with 4.0gr of Titegroup at 1.150 in both USPSA and IDPA.
Good luck!