You need to clarify “lower end”. Are you talking price? Quality? Both? What kind of general budget are you looking at? Are there any specific wants or needs from your wheels? Kind of hard to offer help with such a general description that will mean different things to different people. Typically anything under say $300 is going to be a machine built wheel, which isn’t bad but certainly could be ‘lower end’. I would at all honesty, avoid anything less than $200. Save the extra pennies and buy a better wheelset from the start. The wabi ‘sub-15’ I believe is now like $350 for the set, but it’s still highly recommended. There are a number of good choices at velomine.com as well in the 2-300 dollar category. Aesthetics matter, yes, but so does performance. There already a bunch of good advice about this in the thread. So you need to decide what you’re willing to spend first, then set out personal desires regarding looks, performance, specs, etc. Then from there try and find a wheel set that best matches those in the price range you’ve set.