Mine is accurate as heck.  Last night i was shooting in the garage.  25 feet to target.  I was busting coke bottle caps consistently, with factory open sights.  A scope and 24" barrel would make this thing a literal tack driver.  
I thought about converting to .22.  What is involved in that?  Do I just need a new barrel, bolt and breech?  Is that all available from Crosman?
I intend to keep mine pretty much factory (except maybe going .22).  I just can't justify in my mind spending that kind of money on a pellet pistol.  I checked into upgrading the valve and piston.  That was $50.  The gun was only $50.