It really depends on the person receiving the ring and your budget haha
I guess it really depends on individual. You should talk with your fiancé or fiancée first before committing. Can take go take a look at what jewellery brands can offer first.
My wedding bands and proposal ring are from...
I have both and I would trust a more reputable brand for either lab grown or natural. Have you visited Lee Hwa? They also have lab grown diamond rings although they are famous for natural diamonds like their super ideal cut under Destinee.
i bought mine from lee hwa jewellery some time back during their bridal consultation event. usually they have good deals and also nice door gift. maybe you can check when they having their next event?