Sure, stay on 4.3.3 for now. If the jailbreak for iOS 5.0.1 comes out BEFORE Apple's release of 5.1, then you're good - you can upgrade to the jailbreakable version and then JB.
However - you will have to make a decision if Apple comes out with iOS 5.1 BEFORE a jail break - and you will only have a small amount of time to decide. If you elect to stay at on a JB'd 4.3.3 and not move to iOS 5.0.1 before Apple closes the window, you will never be able to move up to iOS 5.0.1. At this time, having blobs for 5.0.1 on an iPad2 does you no good. If you miss the upgrade, you may not get a chance to upgrade your iPad for a long time. We do not know, at this time, if a jail break can be done on any version than 5.0.1.
There's your option: Stay at 4.3.3 if no jailbreak for iOS 5.0.1 when 5.1 is released and risk NOT being able to upgrade to a jail breakable version for a long time ... if ever. You'll be forced to stay on an older iOS that developers have moved on from if you want to be jail broken.
-or-
Dump your iOS 4.3.3 jail break and move to iOS 5.0.1 when Apple releases 5.1 and hope a jail break is released soon or for that version.
From the way I'm phrasing this, you can probably tell what I recommend. But, as always, YMMV.
Marilyn