Always loved that ranger man. I think you made a good purchase. I have now found out the problems with the 04-08s on mine. My 07 with 40,000 miles just had a new transmission, transfer case motor, IWE hub, and hub actuator put in. Not to mention the cam phasers, fpdm, spark plugs, and the rest of the 4 wheel drive system problems that this generation has. Needless to say, "built ford tough" does not apply to my truck. Hate to say it, but a silverado might be my next truck.
Love the sound of the 5.4l. If you ever decide to change from straight pipes, i highly recommend the 3" MBRP XP series exhaust. Lifetime warranty, full stainless, looks great, and sounds awesome.
As for forums, i prefer f150forum.com.