Agreed with jbeers285 - I/J is the cleanest, most balanced set of starters out there. The gameplay is smoother and easier to grok than G/H. From there, you could pick up that gift set (G/H does have a few good cards, not quite as many as I/J). You could also start grabbing other sets - I'd recommend Disciples, as you've got a chance at picking up some cards that go really well with one of the I/J offenses (the purple brigade disciples). You'd also be getting cards from 3 older sets in those packs (Angel Wars, Patriarchs, and Apostles).
