Hi there Barnvelder
I have just recently purchased the gr3 I upgraded from the wonderful gx100 which I had owned for approx 2.5yrs, the images I shot with this were without doubt lovely, however when I reviewed them most were shot at the wide end or at 28mm. In view of this I made the switch, I am absolutely over the moon that I did, the improvement in quality over the gx is immense...
The files are stunning, the detail, the tonal range the works, I would urge you to persist with the gr3, having a fixed focal length is a liberating experience, it strips away choices so you can concentrate on the picture taking. I have to say it has always been one of my favourite focal lengths, it can shoot portraits, landscapes and the macro facility is stunning.
I think it encourages you to be more proactive when taking a shot, let's be honest if you look at some of the iconic images taken over the years a lot have been shot on 28 and 50 mm lenses. As for me I am in love with this camera it goes everywhere with me, I've also acquired the 21mmm lens (stunning) and as a result of letting the camera slip from my wrist with the supplied lanyard a proper camera strap...
Of the occasions it has slipped, it did so as I was wearing gloves, I went to take the glove off, the lanyard had remained on the glove and the result was the gr3 bouncing on the floor, thankfully two occasions were on forgiving materials carpet and laminate floor, the last was not! it was a car park, I am pleased to say though other than a little graze all is well. That for me also shows why it is worth every penny I paid for it the build quality is simply outstanding..
I intend to post some images onto this site when I figure out how to do it so to speak, as I have a significant number shot with both the gx and now the gr3, in closing I would urge you to persevere as you will not regret doing so...
Happy shooting