Which breastforms are right for me?

[outbackfun4us]

I'm new to the crossdressing adventures. I'm 6'0" 168 LBS. I measure about 34" under my male breasts. I have a fair amount of loose skin and under skin tissue to push to the inside for a cleavage look, which I would like to take advantage of.

I saw a "Diva Bra" online that helps to push the skin and under skin tissue to the cleavage area. The directions I saw stated to use an additional bra to hold the breastforms.

My big question is, what shape and size of breast form is best for my size and with the use of a diva bra?

When I push what I do have to the cleavage area it seems like I need a breastform that will have a void in the area where my natural cleavage sits.

Most of what I read says don't go too big on the size. I'm 6' tall and I want to look both Feminen and sexy. How big can I get away with?