4.9-stable to 5.x

[Randy Bush]

i am running -stable on a thinkpad t40p.  the thing won't resume
(looks like ata interrupt loss), no ath driver, ...  and i have
time over the holidaze to try 5.x.  two questions

  o can i just do the normal upgrade as described in UPDATING
    (cvsup, buildworld, kernel, installworld, ...) from 4.9 to
    5.2RC in one leap?

  o is 5.2RC a good compromise choice?

thanks

randy