Windsurfing

Question
QUESTION: Hi
I am really enjoying windsurfing and am looking into getting a second board. At the moment I'm using an old board purchased by my dad off ebay. Its been great to learn on but we both reckon I will benefit hugely from a modern board. I'm looking at slightly older boards (2008/2009) because new ones are way out of my budget. I'm 13, weigh 51kg and am 5' 10''ish. I can beach start and am trying to learn to water start, I've planed and am venturing into the harness. I surf in a lake but as I progress will probably go on trips to the coast to surf. I want to be able to go fast but have the ability to do simple freestyle moves and bump and jump. The board also has to be able to be used by my dad as we are splitting the price between us.
I was looking at the JP All-Ride because its a good all rounder. Unfortunately this is a new board and is very expensive. The JP X-cite ride looks reasonable but may be too large to jump. The JP FreestyleWave also looks OK but may be too small or unstable to uphaul the sail etc. I have tried a much smaller older board that we own but as I cannot waterstart, once I fall off,I find it very tricky to get started again because of the swell. I think the X-cite ride is preferable out of the two.
Can you please advise me on other possible all-rounder boards that existed in 2007 or 2008 and the best litre to get that enables both me and my Dad to use it.

Thanks

Will

ANSWER: Hi Will,
How much does your Dad weigh?  This will have a big impact on volume as I am assuming your dad weight much more than you.  
What size were the boards you tried but could not waterstart on?  
What are the volume (liter sizes) of all the boards you are looking at that you mentioned above?
The more info you give the more accurate I can be.

---------- FOLLOW-UP ----------

QUESTION: Hi Patrick
My Dad weighs 89kg.
The usual board I use is about 150L, it floats both me and my Dad fine.
The smaller board is( we guess) around 100L or less. It is very narrow and hard to use. It just floats my Dad and floats me easily but as it has no dagger board can get ploughed underwater sideways instead of travelling forwards.
As for waterstarting, I'm sure I can, but I just haven't learnt to. This weekend I am going to make an effort to learn how :)
I have done more research and am no longer looking at the Allride. The X-cite ride looks just fine for me.
The volume we are looking at is about 120L, maybe more to accommodate my Dad. I'm sure a 100L would float me but not my Dad.

Answer
I think at around 125 to 130 liters would be good for both of you but will be on the big side for you and on the small side for you dad. Boards smaller than 115 liters tend to be planning boards and will slide sideways when not planning. It is best to learn waterstarting on at least 125 liters in water that is about neck deep.  First master beach starts in deeper and deeper water.  Start at thigh deep and work up to neck deep full waterstart. As for actual brands and models of boards, it is best to look up board reviews where possible.  Windsurfing magazine usually has archives you reference for older board reviews or Google up the name of the board you want info about.
Good Luck and Good Wind
Patrick