Oh right, I forgot to mention some stuff. My current salmon forecast is a somewhat stiff cambered 154. I tried testing out some of my friends boards and the Salomons noticeable heavier, especially when I'm trying to jump. I'm 5'9 and 148lbs. I'm guessing I would be looking for a board between 150-155. Does that sound about right?
Yes... 150-155 is the right range. I'm 5'9" 145-150 lbs (was 149 this morning) myself. In it's day the Salomon Forecast ERA was a great board (sadly that day was half a decade ago). I demo the Forecast and rode the Daniel Frank 155.5 model (which was a slightly modified Forecast ERA if I recall correctly) and I was around 140 lbs back then. I agree that those boards weren't the lightest, and more importantly didn't have the best pop. FYI, a 2006 board is going to be like half a pound heavier than a modern board (noticeable, but not huge).
Based on your self-description (just starting out on jumps) and the fact that you say the board feels heavy I don't think you are popping off the jumps correctly. Everytime someone complains that the board feels heavy (for both freeride and freestyle), I'm inclined to think that there is an issue with they technique - because when you do it correctly, flex from the the board literally pushes itself into the air
and it should feel weightless.
If you don't know the difference check out 0:15 of the video below.
That's not to say a newer board won't be fun to ride either. I've ridden the K2 Parkstar and Fastplant (I wish they still made the Jibpan, which ironically was not a jib board) and those are decent boards (neither blew my mind though). I'm just trying to help you out and I think aside from a bit of psychological "confidence"... better technique will outdo new gear every day of the year.
Hope this helps.