I had a 2.8F Planar for a long while. Never used it much, because the meter was not working well. I would have to set it to ASA 50 for Tri-X at 320, for example, to get it to meter semi-accurately in daylight. But, then it would be off indoors.... So, i just never trusted it. I had a Maxwell screen in it, and liked it very much.
I much later bought a GX because i wanted to actually use a TLR, and felt i would be much more confident with the metering. That issue was resolved with the GX meter. But, the feel of the camera was just not there. It's a fine camera, for certain. But, if you're used to an older model, you'll probably feel that the GX just isn't up to the standard. How much or just how significant that is depends on how important tactile and sensual factors matter to you in general. I didn't have any issues with loading either camera and never really even noticed a difference with the 'auto' feed mechanism. That wouldn't be a factor for me.
I eventually sold the GX. But, i don't remember why! Probably because i have always had a Hasselblad at the same time and because i was using MF so infrequently, i couldn't justify having them both.
I do want another TLR, though. I would first look for an older model with a working+accurate meter. If it costed as much as a GX, though, i would really struggle with a decision. I'd probably go for the GX - having a meter i could trust and that i believed would LAST would probably outweigh the issue of 'feel,' which may even have faded since i no longer have a vivid memory of the older model.
The one thing i DID love about the 2.8F was the 12/24 function. I wanted to use the TLR for travel, and reloading a TLR on the street in an exotic or uncomfortable environment would be unwelcome. Unfortunately, there are fewer 220 films available now, so it's less of a consideration.