I have the same dilema... I'm a paraglider pilot that tries to be biwingual. I thought of buying a new wing, and I narrowed down to Finsterwalder wings due of short packing facility (no storage room, and small car).
I weight about 68 kg naked, my weight can vary from 65 to 72 kg. I'll have a 4.7 kg harness and a reserve that will be a little over 2 kg. Radio, water, helmet, clothes, boots... so the hang weight will be somewhere around 80 kg.
From Finsterwalder, I think I could choose among 3 wings:
- Lightfex. This seems to me kind of small (14 sqm).
Although it's a single surface, it has VG. Finsterwalder claims 10.5:1 gliding ratio, which I guess is far from truth. I asked somebody on youtube for details, and he told me that my weight is ok for it... but... that it has about 1.4 m/s sink rate (might be an older variant, though). It seems pretty high to me. My first paraglider had that much. My current one has about 9.3:1 gliding ratio and a minimum sink rate of 1.1 m/s or so. Down towards 1.2 at best GR. I seem to be a little too heavy for this glider, although in the weight range...
- Perfex. 16 sqm, no VG, similar with Lightfex in construction. I'm at the bottom of the weight range, perhaps even too light. This glider would have a low stall speed, even lower than my paraglider! Finsterwalder claims lower GR: 10:1. It might mean that the real one is lower than for Lightfex (probably because Lightfex achieves it with VG on).
- Funfex. 16 sqm, double surface. Heavier, higher stall speed. Some say it's harder to land. I'm at the bottom of the weight range. More expensive. 10.5:1 according to Finsterwalder. Should be better than their single surfaces, though.
Now, I don't know what to choose. I would want to get one that does not dissapoint me with the performance, compared with my paraglider. The only thing that seems to be better than my paraglider is top speed (and collapse resistence, this is one reason why I decided to be biwingual).
It's not clear to me how big are the differences between Lightfex and Funfex. Is it worth to get a Funfex, considering the bigger weight and higher stall speed?
PS I'm learning on a Tecma Sport Spirale Grande Vol which is very old and has very bad performance. If Finsterwalder wings have similar performance, I would rather stick with my paraglider.
I'm also a PG pilot and i had the same doubts you have.I definitely wanted a shortpack glider so it was either Perfex or Funfex for me.Shame that Finsterwalder will not update their designs but it is understandable i guess,HG was already in recession before everything went into recession...
The problem is that beginner PG's are offering very good performance compared to beginner HG's.
I don't really expect the Perfex i've ordered to have much more glide or less sink rate than my Sky Anakis2...but it will not collapse,it will dive at high speed and it will handle more wind on take off(i hope...)
I decided on the Perfex vs the Funfex because the perf. increase is probably not that much in the Funfex,the weight,the rigging up/down and the comments by owners.
The Perfex is a "mother" on landings,mixed opinions on the Funfex(PIO).I chose to eat humble pie,things happen fast in an HG landing...
Even though the Perfex design is old it does have most of the features of modern SS gliders...generous double surface at the front and mylar inserts.
Curved wingtips are disliked by many experienced HG pilots,they cange the handling apparently.
I think there is a new market in HG, paraglider pilots who want an easy, simple and light HG they can store and transport easily.But we would like at least the performance of a DHV 1-2 PG.
I'd like to see a Fex Funky,a Fex Freedom,a Fex RX2...
For the weight and wing size choice i would mail Mike Golder at Finsterwalder directly,let him know where you will be flying and the usual conditions(high winds,mountain,strong/weak thermals etc).He should have good advice.