The FXone and Tiger are quite different boats. The Tiger is an F18 and is designed to be sailed 2 up - probably best by two blokes as it weighs around 185kg and to move it around the beach on your own would be nearly impossible. I suspect this boat would also be almost impossible to right on your own if you should capsize it while sailing one up. Given the above once on the water these boats are apparently very nice.
The FXone was designed to be a single handed boat which I believe you can stick a jib on and take a passenger for a ride. I think the FXone weighs in around 145kg. This is probably a much better choice for what you want than a Tiger. Those with more knowledge of the FXone may wish to comment.
From what you are saying are your planned uses of the boats I suggest you look into F16 boats. These are lightweight, high performance boats designed to be sailed one up or two up, with or without spinnaker, with or without a jib. The typical weight of a single handed F16 with spi is about 100kg and sloop rigged with spi ready to sail 2 up about 110 kg.
These boats are easy to move around the beach, easy to right, easy to put on and off the trailer and have the same Texel rating as the F18 (ie they are theoretically the same speed).
See:
http://www.geocities.com/F16HPclass/and also see the F16 High Performance forum on this website.
I sail a Taipan 4.9 with Spinnaker (see attached photo - not my boat) and it is an absolute blast. Highly recommended. Reports on other F16's have also been very positive.
I hope this helps,
Rob.