I agree with cifex. I'm not sure what made you think you should be in the 148-150 range as that seems way too small to me.
I think technically based on weight you probably fall in a range of like 152-158-ish. Generally, you'd go to the short end of your range if your a freestyle/park rider and the higher end if you are a carver/freerider. You claim to be the latter.
Most importantly, you should fall somewhere in the weight range (preferably the middle) designated by the manufacture for a given board - that is the most accurate gauge of how the board is intended to perform.
The other issue, as cifex mentioned, is the flexibility of the board. A soft/flexible board will benefit you only if you are riding a certain way (tricks), whereas a moderately stiffer board will provide more stability.
I'm not fmailiar with many of the boards you mention, but am a fan of Ride and know the Machete gets good reviews. If you look at the specs for the machete on their website, you actually fall in the mid/upper range for the 155 and right in the middle of the 158 size. U