You could do either a plain band or pavé - I think both would look great! I also have a halo engagement ring but with a plain band, and got a pavé wedding band to go with it - the small stones match the halo in my engagement ring and I think it looks good. I actually got my wedding band on Amazon haha, but I love it: https://www.amazon.com/dp/B0842YMGF9/ref=cm_sw_r_cp_api_i_Ba-2EbT4NTJFK