I actually can understand that even though you require a cruiser type bike, your still a weight weenie and want the sleekest coolest looking ride out there.
I would suggest going to the lbs and telling them what you want. They will love to sell you a high end road bike and then sell you additional add-ons.
I say go to the lbs because not all handle bars will adapt easily to all bikes. Let the sales person and mechanic make suggestions.
That being said, as one who also has arthritis in my neck, I urge you to consider your health and comfort over weight.
A suspension fork and sprung saddle may be the wisest choice.
Good luck.