If you do a search on FX-one on this forum you will find several past threads about this very topic. Your questions have been asked several times already.
In summary :
>>Does anyone here know how it sails with two (330lbs total)?
Actually quite well. It seems to like the extra crew weight. The Jib kit makes it feel powered up with respect to the cat rigged setup.
>>Is it too much boat for somone who is starting sailing, I do have a little experience with a friends h16.
It is a sailboat and just like with cars : "There are no bad sailboats anymore". It does have some characteristics that didn't win the approaval of everyone. Do the search to find more comments on this.
>>How easy is it to right solo (I'm 165lbs)
You can forget about that. And I'm not really kidding here. Ask around.
>>Any other information about the FX-One would be great.
I was not to thrilled about the standard cut mainsail and mast combo; it didn't come alive although with the jib I did have several very good runs against the Tigers (sailed by our club champions over the last two years). That was when sailing the FX with jib and a very gung-ho lady of 60 kg's ; I'm 85 kg = total 145 kg = 320 lbs. I was sailing with my eye continiously on the bows thoug; don't let the water hit the beam at speed.
Wouter
Post script; These are my honest comments and I have sailed the FX-one for several tens of hours in all conditions. I did however choose to go with a different boat (over the FX-one)eventually and therefor you may regard my comments as somewhat biased.