Much easier to read and post on the Skybox on an iPhone 6 Plus as opposed to a iPhone 5. Even with our busy car club schedule, I can better keep up.
I had posted in another topic that I had made the decision to go to a phablet, I got the Galaxy Note 4, and I really like it. Stu has the LG G3 which is also a phablet type. I have really enjoyed the larger screen and I can still carry it around pretty easily. My brother just got the iphone 6+ and he's always carried his phone on his belt so this is a big adjustment for him to put it in his pocket. My younger nieces/nephews don't like the bigger form, they are used to being able to put it in their jeans and also use it with one hand. Their jeans are a little tighter than mine so the 6 works well for them. The iphone 4 just looks tiny now when I see one as does the iphone 5.
There is a protective case that comes with a belt clip: The Otterbox Defender. We are using that case when on the motorcycles. http://www.ebay.com/itm/221624012036?_trksid=p2059210.m2749.l2649&var=520481408569&ssPageName=STRK%3AMEBIDX%3AIT
There are actually quite a few belt clip cases for the 6+, but it's still a big phone to put on your belt. I think he's going to give it good try out with just carrying it in his pocket.
I think that the 6 is the same size as my G3 and Terry's Note 4. I don't think that any bigger (ie the 6+) would work well with a belt clip. I use the Otterbox Defender as well, Tom...like it a lot but the phone does sometimes catch when getting out of the car, movie seats, etc. I just used a leather pouch clip with my old G2...until a friend dropped it for me and bricked it.
I'm struggling with a case, I bought one but it made the phone too bulky so I ditched it. My old SIII had a very minimal case, that really just replaced the back of the phone with a book like cover that folded over the face. It was no where near as protective as the Otterbox style that is so popular with iphones, but I really hate to take a very beautifully designed phone and hide in a big box. I did drop my first smart phone (HTC) and cracked the screen and damaged the mic so that I had to buy a new one, I got one used off of ebay so it was only 125$. Never damaged the SIII. They make a similar case for the Note 4 and I might try that one.
Can't remember if you have the 6 or 6 plus... This is what I use for all occasions except for riding on the motorcycle. http://www.ebay.com/itm/251512960054?_trksid=p2059210.m2749.l2649&var=550617846604&ssPageName=STRK%3AMEBIDX%3AIT Also a believer in this for screen protection. Already saved me a screen: http://www.amazon.com/gp/product/B00NIC8YIM/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
So here's something that might be hard to pass up. HP has a 8" tablet (Windows 8.1) that comes with free 4G for life. No wifi not a problem you've got the 4G connection. It's only 170$, now the specs aren't all that great but for that price might have to get one.