Serously, at your weight I would not go for any 15 fot boat or less (meaning waves, twixxies, dragoons, N4.5 etc). You simply enjoy yourself at 95 + 50 = 145 kg on it. At least go for 16 footer or larger. Hobie 16 seem a good choice for yourelf and girlfriend. However two blokes of 95 kg = total 180 kg is alot for it. She will handle it in the recreational sense.
One of the best advices I would give you is to look for secondhand boats in Germany and the Netherlands. You can got good deals for 1000 Euro's on 16 and 18 cats here. The additional cost of driving up here and pick it up will always be way cheaper than anything else.
If you are looking at buying new than there are other interesting options for 12.500.
Go here for a good secondhand offer site for Dutch catamarans:
http://www.marktplaats.nl/markt/watersport/catamarans.htmTake special note of the following models
Hobie 16 Le race 2750 Euro
Nacra 5.5 1950 Euro
Nacra 5.7 3950 Euro (excellent boat for your use, I would really consider this one)
Dart hawk 5.5 (formula 18) 4700 Euro
Nacra 5.5 € 1.750,00
Hobie 16 € 650,00
Prindle 19 € 1.000,00
Hobie 18 LE € 1.950,00
Nacra 5.7 bouwj."86 € 2.250,00
Catamaran Prindel 16 € 1.000,00
Etc
Wouter
