You may have discovered this yourself by now, but a very high level (don't recall what the threshold is) can cause a problem when entering the final area of the game, when you should get a 5 level bonus.
The max level reachable playing normally is about 53, with the mid forties to early fifties being the usual ending range.
iZakaroN's SaveEditor can also give stat and skill point boosts, etc, directly, without boosting the character level.