I ride a 16t White ind. freewheel on long flat rides in the country. I also have a cheap shimano 16t. The WI are very high quality and completely serviceable and rebuildable with parts available from WI. I've had mine for 7 years and it's never broke and I've never serviced it which I should. They have more pawls built in than the cheaper options which should translate to quicker and more positive engagement. I like the loud angry sound it makes when coasting as it lets others know of your approach. They can be had cheaper on eBay new or used. I'd get a 17 or 18t WI if you can justify the cost and plan on riding it a lot, otherwise get or try a cheaper option.