I have been using a set of Orange Urethane tires (don't remember where I bought them) for probably a dozen years or so. They work great with little wear.
Be sure to order the proper width
For "most all" 14" bandsaws of the type you have, a crowned tire is the only choice. The crowned tire works in conjunction with the tracking adjustment on your saw.
Guide bearings vs guide blocks is a Ford vs Chevy argument.
I prefer the bearing assemblies for the reasons you sighted. There is no need to lubricate the saw blade via the guide blocks.
There is friction with the blocks, which in turn creates heat. This is one reeason why many are made from ceramic to help dissipate the heatand use names like 'cool-blocks" . Wooden guide blocks are many times made from Lignum vitea or similar species. These woods will release some natural oils when heated by the blade friction and help to reduce said friction.
Either method works to "help" keep the blade aligned.

I do not know about tires.  I tried cool blocks on 2 different saws and did not like them. for me they did a terrible job of supporting the blade. I ponied up for a set of the Carter roller guides and have not been sorry.  It was a little expensive at the time but "darn well worth it" in the long run.  The blades stay sharper and last longer and cut better with the Carter system installed.  Unless you have a problem with the present  tires I would suggestive guides first.  My bandsaw is a 50 year old Delta.  I did have a big Jet at work at one time and it seems like it came with some sort of roller guides but I expect the Carter would be an improvement.  I just looked out of curiosity and Amazon has the Carter guides for the 14" Jet.

Based on Bill's comment I checked out the Carter conversion kit, the magfence, and the FAST system. I ordered new tires and am probably going to take it one step at a time. That is, try a new blade with the new tires and see what happens. However, the Carter products are intriguing, pricey, but intriguing.
My objective is to be able to accurately cut veneers, (sorry Ed), and do other resawing.
I may do some curve cutting but mostly resawing.
Any more thoughts on the Carter products?
Thanks
Bruce

My old bandsaw, 25 or so years, and my new bandsaw maybe 15 years both have rubber tires. The new saw had a blade come off and a bit of the outside edge on the teeth side got chewed up, but they both still work fine. Have to scrape them off once in a while and even take some 120 grit to them to clean them off. If they ever wear out, I will probably try the urethane tires,

robo hippy