save your shsh blobs using tiny umbrella so you can downgrade back to 4.1 my self if ive been jailbroken on 4.1, 4.2.1 and 4.3.3 ive found both 4.1 and 4.3.3 more stable personally but others have had no issues with 4.3.3
if i was you id jailbreak on 4.1 to see what its like see how stable it is for you then if you missing features that a new iOS will offer then upgrade and re-jailbreak