Leigh, I'm on 5 semitether JB, should I go stock or I be ok as I'm now?
Difficult one Ernie. I would probably stay where you are, but the choice has to be yours...

For the record, in case it help anyone else out, or just for interests sake, here's what I've done...
1. downgraded my iPhone4S back to 5.0 (from 5.0.1b2), cos I really really want a jailbreak on the 4S
2. am leaving my iPad2 3G jailbroken on 4.3.3 because it's awesome

3. upgraded my iPad1 to 5.0.1 and have jailbroken it tethered, cos untethered on the iPad1 is over rated

4. leaving my iPhone4 on 4.3.3 "just because"