I am big fan of Maxi-mini but they will not host clowns. LTA are fairly hardy, do not clone/split as readily as BTA and host clowns. I like the looks of some Rock/Flower anemones but they do not host clowns (with the rare exception).
bta or rock nems. if youre wanting one for your clowns, go with a bta. as for which one, thats totally up to you! many cool variants out there, but my favorites are CO sunburst, Inferno, lemondrop, supernova, rainbow, etc...they arent cheap, but they are amazing!