I would say ride more, read more before you make a wholesale change. What's your current gearing? What's your terrain like? What's your fitness level? How old are you? What are you trying to get out of cycling?

For example 53/39 cranksets certainly seem out of favor for recreational cyclists, but if your terrain is mild or you're very strong, then you might be ok. My mid-30's son is fine with a 53/39 and a 12-28 cassette for climbing, but he's very strong. I'm late 60's and I've got a triple with a 12-30; that's lets me do 100K rides with 5K-6K of climbing. No way I could do that with a double (well, I could use an 11-36 cassette, but the spacing is awful).

Provide more information and enjoy the thread, but most of this you've got to work out for yourself.